Chapter V: Part 5

The use of the wireless for ships and lighthouses sprang into favor, and wireless stations were established all around the British coasts so that ships equipped with wireless might keep in communication with the land. The British Admiralty quickly recognized the value of wireless telegraphy to war vessels. While field telegraphs and telephones had served the armies, the navies were still dependent upon primitive signals, since a wire cannot be strung from ship to ship nor from ship to shore. So the British battle-ships were equipped with wireless apparatus and a thorough test was made. A sham battle was held in which all of the orders were sent by wireless, and communication was constantly maintained both between the flag-ships and the vessels of their fleets and between the flag-ships and the shore. Marconi's invention had again proved itself.

The wireless early demonstrated its great value as a means of saving life at sea. Lightships off the English coast were equipped with the wireless and were thus enabled to warn ships of impending storms, and on several occasions the wireless was used to summon aid from the shore when ships were sinking because of accidents near the lightship.

Following the establishment of communication with France, Marconi increased the range of his apparatus until he was able to cover most of eastern Europe. In one of his demonstrations he sent messages to Italy. His ambition, however, was to send messages across the Atlantic, and he now attacked this stupendous task. On the coast of Cornwall, England, he began the construction of a station which should have sufficient power to send a message to America. Instead of using a single wire for his aerial, he erected many tall poles and strung a number of wires from pole to pole. The comparatively feeble batteries which had furnished the currents used in the earlier efforts were replaced with great power-driven dynamos, and converters were used instead of the induction coil. Thus was the great Poldhu station established.

Late in 1901 Marconi crossed to America to superintend the preparations there, and that he himself might be ready to receive the first message, should it prove possible to span the ocean. Signal Hill, near St. John's, Newfoundland was selected as the place for the American station. The expense of building a great aerial for the test was too great, and so dependence was had upon kites to send the wires aloft. For many days Marconi's assistants struggled with the great kites in an effort to get them aloft. At last they flew, carrying the wire to a great height. The wire was carried into a small Government building near by in which Marconi stationed himself. At his ear was a telephone receiver, this having been substituted for the relay and the Morse instrument because of its far greater sensitiveness.

Marconi had instructed his operator at Poldhu to send simply the letter "s" at an hour corresponding to 12.30 A.M. in Newfoundland. Great was the excitement and suspense in Cornwall when the hour for the test arrived. Forgetting that they were sleepy, the staff crowded about the sending key, and the little building at the foot of the ring of great masts supporting the aerial shook with the crash of the blinding sparks as the three, dots which form the letter "s" were sent forth. Even greater was the tension on the Newfoundland coast, where Marconi sat eagerly waiting for the signal. Finally it came, three faint ticks in the telephone receiver. The wireless had crossed the Atlantic. Marconi had no sending apparatus, so that it was not until the cable had carried the news that those in England knew that the message had been received.

Because Marconi had never made a statement or a claim he had not been able to prove, he had attained a reputation for veracity which made his statement that he had received a signal across the Atlantic carry weight with the scientists. Many, of course, were skeptical, and insisted that the simple signal had come by chance from some ship not far away. But the inventor pushed quietly and steadily ahead, making arrangements to perfect the system and establish it so that it would be of commercial use.

Marconi returned to England, but two months later set out for America again on the liner _Philadelphia_ with improved apparatus. He kept in constant communication with his station at Poldhu until the ship was a hundred and fifty miles from shore. Beyond that point he could not send messages, as the sending apparatus on the ship lacked sufficient power. Messages were received, however, until the sending station was over two thousand miles away. This seemed miraculous to those on shipboard, but Marconi accepted it as a matter of course. He had equipped the Poldhu station to send twenty-one hundred miles, and he knew that it should accomplish the feat.

A large station was set up at Cape Breton, Nova Scotia, and regular communication was established between there and Poldhu. With the establishment of regular transatlantic communication the utility of Marconi's invention, even for work at great distances, was no longer open to question. By quiet, unassuming, conscientious work he had put another great carrier of messages at the service of the world, and he now reaped the fame and fortune which he so richly deserved.

XVIII

THE WIRELESS SERVES THE WORLD

Marconi Organized Wireless Telegraphy Commercially--The New Wonder
at the Service of the World--Marine Disasters Prevented--The
Extension of the Wireless on Shipboard--Improved Apparatus--The
Wireless in the World War--The Boy and the Wireless.

With his clear understanding of the possibilities of his invention, Marconi was not long in establishing the wireless upon a commercial basis. He is a man of keen business judgment, and as he brought his invention forward and clearly demonstrated its worth at a time when commercial enterprise was alert he found no great difficulty in establishing his company. The first Marconi company was organized as early as 1897 under the name of the Wireless Telegraph and Signal Company, Limited. This was later displaced by the Marconi Telegraph Company, which operates a regular system of stations on a commercial basis, carrying messages in competition with the cable and telegraph companies. It also erects stations for other companies which are operated under the Marconi patents.

With the telegraph and the telephone so well established and serving the needs of ordinary communication on land, it was natural that the wireless should make headway but slowly as a commercial proposition between points on land. For communication at sea, however, it had no competition, and merchant-ships as well as war vessels were rapidly equipped with wireless apparatus.

When the great liner _Republic_ was sinking as a result of a collision off the port of New York in 1903 her wireless brought aid. Her passengers and crew were taken off in safety, and what otherwise would have been a terrible disaster was avoided by the use of the wireless. The utility of the wireless was again brought sharply to the attention of the world. It was realized that a wireless set on a passenger-ship was necessary if the lives of the passengers were to be safeguarded. The United States Government by its laws now requires that passenger-ships shall be equipped with wireless apparatus in charge of a competent operator.

One of the early objections made to the wireless was its apparent lack of secrecy, since any other receiving apparatus within range of the waves sent forth by the sending station can receive the signals. It was also realized that as soon as any considerable number of stations were established about the world, and began sending messages to and fro, there would be a perfect jumble of waves flying about in all directions through the ether, so that no messages could be sent or received.

Marconi's answer to these difficulties was the tuning apparatus. The electric waves carrying the messages may be sent out at widely varying lengths. Marconi found that it was possible to adjust a receiving station so that it would receive only waves of a certain length. Thus stations which desired to communicate could select a certain wave-length, and they could send and receive messages without interfering with others using different wave-lengths, or without the receiving station being confused by messages coming in from other stations using different wave-lengths. You know that when a tuning-fork is set in vibration another of the same pitch near it will vibrate with it, but others of different pitch will not be affected. The operation of wireless stations in tune with each other is similar.

The camera was exposed for two hours, and the white bars show the sparks leaving the wires for their journey through the air for seventeen hundred miles.]

These dynamos send a message straight across the ocean.]

An example of the value of tuning is afforded by the manner in which press reports are sent from the great Marconi station at Poldhu. Each night at a certain hour this station sends out news reports of the events of the day, using a certain set wave-length. Each ship on the Atlantic and every land station within range which is to receive the reports at that hour adjusts its receiving set to receive waves of that length. In this way they hear nothing but the Poldhu news reports which they desire to receive, and are not troubled by messages from other stations within range.

Secrecy is also attained by the use of tuning. It is possible that another station may discover the wave-length being used for a secret message and "listen in," but there are so many possible wave-lengths that this is difficult. Secrecy may also be secured by the use of code messages.

Many of the advantages of tuning were lost by the international agreement which provided that but two wave-lengths should be used for commercial work. This, however, enables ships to get in touch with other ships in time of need. With his telephone receivers the operator can hear the passage of the waves as they are brought to him by his aerial and the dots and dashes sound as buzzes of greater or less length. Out of the confusion of currents passing through the air he can select the messages he wishes to read by sound.

You may wonder how one wireless operator gets into communication with another. He first listens in to determine whether messages are coming through the ether within range in the wave-length he is to use. Hearing nothing, he adjusts his sending apparatus to the desired wave-length and switches this in with the signal aerial which serves both his sending and his receiving set. This at the same time disconnects his receiving set. He sends out the call letters of the station to which he wishes to send a message, following them with his own call letters, as a signature to show who is calling. After repeating these signals several times he switches out his sending set and listens in with his receiving set. If he then gets an answer from the other station he can begin sending the message.

Marconi was not allowed to hold the wireless field unmolested. Many others set up wireless stations, some of them infringing upon Marconi's patents. Others have devised wireless systems along more original lines. Particularly we should mention two American experimenters, Dr. de Forest and Professor Fessenden. Both have established wireless systems with no little promise. The system of Professor Fessenden is especially unique and original and may be destined to work a revolution in the methods of wireless telegraphy.

With an increase in the number of wireless stations and varieties of apparatus came a wide increase in the uses to which wireless telegraphy was applied. We have already noticed the press service from Poldhu. The British Government makes use of this same station to furnish daily news to its representatives in all parts of the world. The wireless is also used to transmit the time from the great observatories.

Some of the railroads in the United States have equipped their trails as well as their stations with wireless sets. It has proved its worth in communicating between stations, taking the place in time of need of either the telegraph or the telephone. In equipping the trains with sets a difficulty was met in arranging the aerials. It is, of course, impossible to arrange the wires at any height above the cars, since they would be swept away in passing under bridges. Even with very low aerials, however, communication has been successfully maintained at a distance of over a hundred miles. The speed of the fastest train affects the sending and receiving of messages not at all. It was also found that messages passed without hindrance, even though the train was passing through a tunnel.

Another interesting application of wireless telegraphy is to the needs of the fire-fighters. Fire stations in New York City have been equipped with wireless telegraph sets, and they have proved so useful in spreading alarms and transmitting news of fires that they seem destined to come into universal use.

The outbreak of the world war gave a tremendous impetus to the development of wireless telegraphy. The German cable to the United States was cut in the early days of the conflict. The sending power of wireless stations had been sufficiently increased, however, so that the great German stations could communicate with those in the United States. Communication was readily maintained between the Allies by means of wireless, the great stations at Poldhu and at the Eiffel Tower in Paris being in constant communication with each other and with the stations in Italy and in Russia.

Portable field sets had been used with some slight success even in the Boer War, and had definitely proved their worth in the Balkans. The outbreak of the greater war found all of the nations equipped with portable apparatus for the use of their armies. These proved of great use. The field sets of the United States Army also proved their utility in the campaign into Mexico in pursuit of Villa. By their means it was possible for General Pershing's forces to keep in constant touch with the headquarters in the United States.

The wireless proved as valuable to the navies as had been anticipated. The Germans in particular made great improvements in light wireless sets designed for use on aircraft. The problem of placing an aerial on an aeroplane is difficult, but no little headway has been made in this direction.

It is the American boy who has done the most interesting work with the wireless in the United States. While the commercial development has been comparatively slow, the boys have set up stations by the thousands. Most of these stations were constructed by the boys themselves, who have learned and are learning how best to apply this modern wonder to the service of man. So many amateurs set up stations that the Government found it necessary to regulate them by law. The law now requires that amateur experimenters use only short wave-lengths in their sending, which will not interfere with messages from Government or commercial stations. It also provides for the licensing of amateurs who prove competent.

The stations owned and operated by boys have already proved of great use. In times of storm and flood when wire communication failed they have proved the only means of communicating with many districts. In time of war these amateur stations, scattered in all parts of the country, might prove immensely valuable. Means have now been taken to so organize the amateurs that they can communicate with one another, and by this means messages may be sent to any part of the country.

One young American, John Hays Hammond, Jr., has applied the wireless in novel and interesting ways. By means of special apparatus mounted on a small boat he can by the means of a wireless station on shore start or stop the vessel, or steer it in any direction by his wireless control. He has applied the same system to the control of torpedoes. By this means a torpedo may be controlled after it has left the shore and may be directed in any direction as long as it is within sight. This invention may prove of incalculable benefit should America be attacked by a foreign power.

What startling developments of wireless telegraphy lie still in the future we do not know. Marconi has predicted that wireless messages will circle the globe. "I believe," he has said, "that in the near future a wireless message will be sent from New York completely around the world without relaying, and will be received by an instrument in the same office with the transmitter, in perhaps less time than Shakespeare's forty minutes."

Not long ago the United States battle-ship _Wyoming_, lying off Cape Henry on the Atlantic coast, communicated with the _San Diego_ at Guaymas, on the Pacific coast of Mexico. This distance, twenty-five hundred miles across land, shows that Marconi's prediction may be realized in the not distant future.

XIX

SPEAKING ACROSS THE CONTINENT

A New "Hello Boy" in Boston--Why the Boy Sought the Job--The Useful
Things the Boy Found to Do--Young Carty and the Multiple
Switchboard--Called to New York City--He Quiets the Roaring
Wires--Carty Made Engineer-in-Chief--Extending the Range of the
Human Voice--New York Talks to San Francisco Over a Wire.

It seemed to many that the wireless telegraph was to be the final word in the development of communication, but two striking achievements coming in 1915 proved this to be far from the case. While one group of scientists had given themselves to experimentation with the Hertzian waves which led to wireless telegraphy, other scientists and engineers were busily engaged in bringing the telephone to a perfection which would enable it to accomplish even more striking feats. These electrical pioneers did not work as individuals, but were grouped together as the engineering staff of the American Telephone and Telegraph Company. At their head was John J. Carty, and it was under his guiding genius that the great work was accomplished. John Carty is the American son of Irish parents. He was born in Cambridge, Massachusetts, on April 14, 1861. His father was a gun-maker and an expert mechanic of marked intelligence and ingenuity who numbered among his friends Howe, the creator of the sewing-machine. As a boy John Carty displayed the liveliest interest in things electrical. When the time came for him to go to school, physics was his favorite study. He showed himself to be possessed of a keen mind and an infinite capacity for work. To these advantages was added a good elementary education. He was graduated from Cambridge Latin School, where he prepared for Harvard University. Before he could enter the university his eyesight failed, and the doctor forbade continuance of study. Many a boy would have been discouraged by this physical handicap which denied him complete scholastic preparation. But this boy was not the kind that gives up. He had been supplementing his school work in physics with experimentations upon his own behalf. Let us let Mr. Carty tell in his own words how he next occupied himself.

I had often visited the shop of Thomas Hall, at 19 Bromfield
Street, and looked in the window. I went in from time to time,
not to make large purchases, but mostly to make inquiries and
to buy some blue vitriol, wire, or something of the kind. It
was a store where apparatus was sold for experimentation in
schools, and on Saturdays a number of Harvard and Institute
of Technology professors could be found there. It was quite a
rendezvous for the scientific men in those days, just the
same as the Old Corner Bookstore at the corner of School and
Washington Streets was a place where the literary men used to
congregate. Don't think that I was an associate of these great
scientists, but I was very much attracted to the atmosphere of
that store. I wanted to get in and handle the apparatus.

Finally it occurred to me that I would like to get into the
business, somehow. But I did not have the courage to go in
and ask them for a job. One day I was going by and saw a sign
hanging out, "Boy Wanted." I was about nineteen, and really
thought I was something of a scientist, not exactly a boy. I
was a boy, however. I walked by on one side of the street and
then on the other, looking in, and finally the idea possessed
me to go in and strike for that job. So I took down the sign,
which was outside the window, put it under my arm, and went in
and persuaded Tom Hall that I was the boy he wanted.

He said, "When can you begin?" I said, "Now." There was no
talk of wages or duties. He said, "Take this package around
to Earle & Prew's express and hurry back, as I have another
errand for you to do." So I had to take a great, heavy box
around to the express-office and get a receipt for it. I
found, when Saturday night came around, that I had been
engaged at the rate of fifty cents a day. I would have been
glad to work for nothing.

Well, I did not get near that apparatus in a hurry, not until
the time came for fixing up the window. My first talk in
regard to it had no reference to services in a scientific
capacity on my part. I had rather hoped that the boss would
come around and consult with, me as to how to adjust the
apparatus. But that was not it. He said: "John, clean out that
window. Everything is full of dust, and be careful and don't
break anything!" So I cleaned it out. I swept out the place,
cleaned about there, did errands, mixed battery solutions, and
got a great deal of experience there in one way or another. I
did whatever there was to do and got a good deal of fun out
of it, while becoming acquainted with the state of the art of
that day. I got to know intimately all the different sorts of
philosophical apparatus there were, and how to mix the various
battery solutions. In fact, I became really quite experienced
for those times in such matters.

It was not long before young Carty lost his job. Being a regular boy, he had been guilty of too much skylarking. This experience steadied him, and he forthwith sought a new job. He had met some of the employees of the telephone company and was naturally interested in their work. At that time "hello boys" held sway in the crude telephone exchanges, the "hello girl" having not yet appeared. So John Carty at the age of nineteen went to work in the Boston telephone exchange.

The switchboard at which they placed him had been good enough for the other boys who had been called upon to operate it, and indeed it represented the best thought and effort of the leaders in the telephone world. But it did not satisfy Carty, who, not content with simply-operating the board, studied its construction and began planning improvements. As Mr. Carty himself puts it:

The little switchboards of that day were a good deal like the
automobiles of some years ago--one was likely to spend more
time under the switchboard than, sitting at it! In that way I
learned a great deal about the arrangement and construction
of switchboards. Encountering the trouble first, I had an
advantage over others in being able to suggest a remedy. So I
have always thought it was a good thing to have troubles, as
long as they are not too serious or too numerous. Troubles are
certainly a great advantage, if we manage them correctly.

Certainly Carty made these switchboard troubles the first stepping-stone in his climb to the top in the field of telephone engineering. The improvements which the youngster suggested were so valuable that they were soon being made under his direction, and ere long he installed in the Boston exchange the first multiple switchboard, the fundamental features of which are in the switchboards of to-day. In his work with the switchboards young Carty early got in touch with Charles E. Scribner, another youngster who was doing notable work in this field. The young men became fast friends and worked much together. Scribner devoted himself almost exclusively to switchboards and came to be known as the father of the modern switchboard.

Boston had her peculiar problems and an "express" service was needed. How to handle this in the exchange was another problem, and this, too, Carty solved. For this purpose he designed and installed the first metallic circuit, multiple switchboard to go into service. The problems of the exchange were among the most serious of the many which troubled the early telephone companies. Of course every telephone-user desired to be able to converse with any other who had a telephone in his office or residence. The development of the switchboards had been comparatively slow in the past, and the service rendered by the boys proved far from satisfactory. The average boy proved himself too little amenable to discipline, too inclined to "sass" the telephone-users, and too careless. But the early use of "hello boys" was at least a success for the telephone in that it brought to its service John J. Carty. This boy pointed the way to the great improvements that made it possible to handle the constantly growing volume of calls expeditiously and effectively.

The early telephones were operated with a single wire grounded at either end, the earth return being used to complete the circuit as with the telegraph. But while the currents used to operate the telegraph are fairly strong and so can dominate the earth currents, the tiny currents which represented the vibrations of the human voice were all too often drowned by the earth currents which strayed on to the lines. Telephone engineers were not then agreed that this caused the difficulty; but they did know there was difficulty. Many weird noises played over the lines and as often as not the spoken word was twisted into the strangest gibberish and rendered unintelligible. If the telephone was to satisfy its patrons and prove of real service to the world, the difficulty had to be overcome. Some of the more progressive engineers insisted that a double-wire system without a ground was necessary. This, of course, involved tremendous expenses in rebuilding every line and duplicating every wire. The more conservative hesitated, but Carty forged ahead.

In 1880 he was engaged in operating a new line out of Boston. He was convinced that the double-wire system alone could be successful, and he arranged to operate a line on this plan. Taking two single lines, he instructed the operator at the other end to join them, forming a two-wire circuit. The results justified him. At last a line had been attained which could be depended upon to carry the conversation.

No sooner was one problem solved than another presented itself. What to do with the constantly increasing number of wires was a pressing difficulty. All telephone circuits had been strung overhead, and with the demand for telephones for office and residence rapidly increasing, the streets of the great cities were becoming a perfect forest of telephone poles, with the sky obscured by a maze of wires. Poles were constantly increased in height until a line was strung along Wall Street in New York City at a height of ninety feet. From the poles the wires overflowed to the housetops, increasing the difficulty of the engineers. How to protect the wires so that they could be placed underground was the problem.

We have noticed that Theodore Vail had been brought to the head of the Bell system in its infancy and had led the fight against the rival companies until it was thoroughly established. Now he was directing his genius and executive ability to so improving the telephone that it should serve every need of communication. While the engineers discussed theories Vail began actual tests. A trench five miles long was dug beside a railway track by the simple expedient of hitching a plow to a locomotive. In this trench were laid a number of wires, each with a different covering. The gutta-percha and the rubber coverings which had been used in cable construction predominated. It was found that these wires would carry the telephone currents, not as well as might be desired, but well enough to assure Vail that he was on the right track. The companies began to place their wires underground, and Vail saw to it that the experiments with coverings for telephone wires were continued. The result was the successful underground cables in use to-day.

At the same time Vail and his engineers were seeking to improve the wires themselves. Iron and steel wires had been used, but they proved unsatisfactory, as they rusted and were poor conductors. Copper was an excellent conductor, but the metal in the pure state is soft and no one then knew how to make a copper wire that would sustain its own weight. But Vail kept his men at the problem and the hard-drawn copper wire was at length evolved. This proved just what was needed for the telephone circuits. The copper wire was four times as expensive as the iron, but as it was four times as good Vail adopted it.

John Carty had rather more than kept pace with these improvements. He was but twenty-six years of age when Union N. Bethell, head of the New York company, picked Carty to take charge of the telephone engineering work in the metropolis. Bethell was Vail's chief executive officer, and under him Carty received an invaluable training in executive work. Carty's largest task was putting the wires underground, and here again he was a tremendous success. He found ways to make cables cheaper and better, and devised means of laying them at half the former cost. Having solved the most pressing problems in this field, his employers, who had come to recognize his marked genius, set him to work again on the switchboard. He was placed in charge of the switchboard department of the Western Electric Company, the concern which manufactures the apparatus for the telephone company. The switchboard, as we have seen, was Carty's first love, and again he pointed the way to great improvements. Most of the large switchboards of that time were installed under his direction, and they were better switchboards than had ever been known before.

Up to this time it had been thought necessary to have individual batteries supplying current to each line. These were a constant source of difficulty, and Carty directed his own attention, and that of his associate engineers, to finding a satisfactory solution. He sought a method of utilizing one common battery at the central station and the way was found and the improvement accomplished.

Though the telephone circuits were now protected from the earth, telephone-users, at times when the lines were busy, were still troubled with roarings and strange cross-talk. Though busy with the many engineering problems which the telephone heads had assigned to him, Carty found time for some original research. He showed that the roarings in the wires were largely caused by electro-static induction. In 1889 he read a paper before the Electric Club that startled the engineers of that day. He demonstrated that in every telephone circuit there is a particular point at which, if a telephone is inserted, no cross-talk can be heard. He had worked out the rules for determining this point. Thus he had at once discovered the trouble and prescribed the cure. Of course it could not be expected that the sage experts would all agree with young Carty right away; but they were forced to in the end, for again he was proved right.

By 1901 Carty was ready with another invention which was to place the telephone in the homes of hundreds of thousands who, without it, could scarcely have afforded this modern necessity. This was the "bridging bell" which made possible the party line. By its use four telephones could be placed on a single line, each with its own signal, so that any one could be rung without ringing the others. Its introduction inaugurated a new boom in the use of the telephone.

Theodore Vail had resigned from his positions with the telephone companies in 1890 with the determination to retire from business. But when the panic of 1907 came the directors of the company went to him on his Vermont farm and pleaded with him to return and again resume the leadership. Other and younger men would not do in this business crisis. They also pointed out that the nation's telephones had not yet been molded into the national system which had been his dream--a system of universal service in which any one at any point in the country might talk by telephone with any other. So Vail re-entered the telephone field and again took the presidency of the American Telephone and Telegraph Company.

One of his first official acts was to appoint John J. Carty his chief engineer. Vail had selected the right man to make his dreams come true; Carty now had the executive who would make it possible for him to accomplish even larger things. He set about building up the engineering organization which was to accomplish the work, selecting the most brilliant graduates of American technical schools. He set this organization to work upon the extension and development of the long-distance telephone lines.

As a "hello boy" Carty had believed in the possibility of the long-distance telephone when others had scoffed. He has told of an early experience while in the Boston exchange:

One hot day an old lady toiled up the inevitable flights of
stairs which led to the telephone-office of those times.
Out of breath, she sat down, and when she had recovered
sufficiently to speak she said she wanted to talk to Chicago.
My colleagues of that time were all what the ethnologists
would rank a little bit lower than the wild Indian. These
youngsters set up a great laugh; and, indeed, the absurdity of
the old lady's project could hardly be overstated, because
at that time Salem was a long-distance line, Lowell sometimes
worked, and Worcester was the limit--that is, in every sense
of the word. The Lowell line was so unreliable that we had a
telegraph operator there, and when the talk was not possible,
he pushed the message through by Morse. It is no wonder that
the absurdity of the old lady's proposal was the cause
of poorly suppressed merriment. But I can remember that I
explained to her that our wires had not yet been extended to
Chicago, and that, after she had departed, I turned to the
other operators and said that the day would come when we could
talk to Chicago. My prophecy was received with what might
be called--putting it mildly--vociferous discourtesy.
Nevertheless, I remember very well the impression which that
old lady's request made upon me; and I really did believe
that, some day or other, in some way, we would be able to talk
to Chicago.

By 1912 it was possible to talk from New York to Denver, a distance of 2,100 miles. No European engineers had achieved any such results, and this feat brought to Carty and his wonderful staff the admiration of foreign experts. But for the American engineers this was only a starting-point.

The next step was to link New York and California. This was more than a matter of setting poles and stringing wires, stupendous though this task was. The line crosses thirteen States, and is carried on 130,000 poles. Three thousand tons of wire are used in the line. The Panama Canal took nine years to complete, and cost over three hundred million dollars; but within that time the telephone company spent twice that amount in engineering construction work alone, extending the scope of the telephone.

The technical problems were even more difficult. Carty and his engineers had to find a way to send something three thousand miles with the breath as its motive power. It was a problem of the conservation of the tiny electric current which carried the speech. The power could not be augmented or speech would not result at the destination.

Added to the efforts of these able engineers was the work of Prof. Michael I. Pupin, of Columbia University, whose brilliant invention of the loading coil some ten years before had startled the scientific world and had increased the range of telephonic transmission through underground cables and through overhead wires far beyond what had formerly been possible. Professor Pupin applied his masterful knowledge of physics and his profound mathematical attainments so successfully to the practical problems of the transmission of telephone speech that he has been called "the telephone scientist." It is impossible to talk over long-distance lines anywhere in America without speaking through Pupin coils, which are distributed throughout the hundreds of thousands of miles of wire covering the North American continent. In the transcontinental telephone line Pupin coils play a most important part, and they are distributed at eight-mile intervals throughout its entire length from the Atlantic to the Pacific. In speaking at a dinner of eminent scientists, Mr. Carty once said that on account of his distinguished scientific attainments and wonderful telephonic inventions, Professor Pupin would rank in history alongside of Bell himself.

We have seen how Alexander Graham Bell, standing in the little room in Boston, spoke through the crude telephone he had constructed the first words ever carried over a wire, and how these words were heard and understood by his associate, Thomas Watson. This was in 1876, and it was in January of 1915--less than forty years later--that these two men talked across the continent. The transcontinental line was complete. Bell in the offices of the company in New York talked freely with Watson in San Francisco, and all in the most conversational tone, without a trace of the difficulty that had attended their first conversation over the short line. Thus, within the span of a single life the telephone had been developed from a crude instrument which transmitted speech with difficulty over a wire a hundred feet long, until one could be heard perfectly, though over three thousand miles of wire intervened.

The spoken word travels across the continent almost instantaneously, far faster than the speed of sound. If it were possible for one to be heard in San Francisco as he shouted from New York through the air, four hours would be required before the sound would arrive. Thus the telephone has been brought to a point of perfection where it carries sound by electricity and reproduces it again far more rapidly and efficiently than sound can be transmitted through its natural medium.

XX

TELEPHONING THROUGH SPACE

The Search for the Wireless Telephone--Early Successes--Carty and
His Assistants Seek the Wireless Telephone--The Task Before Them--De
Forest's Amplifier--Experimental Success Achieved--The
Test--Honolulu and Paris Hear Arlington--The Future.

No sooner had Marconi placed the wireless telegraph at the service of the world than men of science of all nations began the search for the wireless telephone. But the vibrations necessary to reproduce the sound of the human voice are so infinitely more complex than those which will suffice to carry signals representing the dots and dashes of the telegraph code that the problem long defied solution. Scientists attacked the problem with vigor, and various means of wireless telephony were developed, without any being produced which were effective over sufficient ranges to make them really useful.

Probably the earliest medium chosen to carry wireless speech was light rays. A microphone transmitter was arranged so that the vibrations of the voice would affect the stream of gas flowing in a sensitive burner. The flame was thus thrown into vibrations corresponding to the vibrations of sound. The rays from this flame were then directed by mirrors to a distant receiving station and there concentrated on a photo-electric selenium cell, which has the strange property of varying its resistance according to the illumination. Thus a telephone receiver arranged in series with it was made to reproduce the sounds.

This strange, wireless telephone was so arranged that a search-light beam could be used for the light path, and distances up to three miles were covered. Even with this limited range the search-light telephone had certain advantages. Its message could be received only by those in the direct line of the light. Neither did it require aerial masts or wires and a trained telegrapher who could send and receive the telegraph code. It was put to some use between battle-ships and smaller craft lying within a radius of a few miles. The sensitive selenium cell proved unreliable, however, and this means of communication was destined to failure.

The experimenters realized that future success lay in making the ether carry telephonic currents as it carried telegraphic currents. They succeeded in establishing communication without wires, using the same antenna as in wireless telegraphy, and the principles determined are those used in the wireless telephone of to-day. The sending apparatus was so arranged that continuous oscillations are set up in the ether, either by a high-frequency machine or from an electric arc. Where set up by spark discharges the spark frequency must be above twenty thousand per second. This unbroken wave train does not affect the telephone and is not audible in a telephone receiver inserted in the radio receiving circuit. But when a microphone transmitter is inserted in the sending circuit, instead of the make-and-break key used for telegraphy, the waves of the voice, thrown against the transmitter in speaking, break up the waves so that the telephone receiver in the receiving circuit will reproduce sound. Here was and is the wireless telephone. Marconi and many other scientists were able to operate it successfully over comparatively short distances, and were busily engaged in extending its range and improving the apparatus. One great difficulty involved was in increasing the power of the sending apparatus. Greater range has been secured in wireless telegraphy by using stronger sending currents. But the delicate microphone would not carry these stronger currents. Increased sensitiveness in the receiving apparatus was also necessary.

Not content with their accomplishments in increasing the scope of the wire telephone, the engineers of the Bell organization, headed by John J. Carty, turned their attention to the wireless transmission of speech. Determined that the existing telephone system should be extended and supplemented in every useful way, they attacked the problem with vigor. It was a problem that had long baffled the keenest of European scientists, including Marconi himself, but that did not deter Carty and his associates. They were determined that the glory of spanning the Atlantic by wireless telephone should come to America and American engineers. They wanted history to record the wireless telephone as an American achievement along with the telegraph and the telephone.

The methods used in achieving the wireless telephone were widely different from those which brought forth the telegraph and the telephone. Times had changed. Men had found that it was more effective to work together through organizations than to struggle along as individuals. The very physical scope of the undertakings made the old methods impracticable. One cannot perfect a transcontinental telephone line nor a transatlantic wireless telephone in a garret. And with a powerful organization behind them it was not necessary for Carty and his associates to starve and skimp through interminable years, handicapped by the inadequate equipment, while they slowly achieved results. This great organization, working with modern methods, produced the most wonderful results with startling rapidity.

Important work had already been done by Marconi, Fessenden, De Forest, and others. But their results were still incomplete; they could not talk for any considerable distance. Carty organized his staff with care, Bancroft Gerhardi, Doctor Jewett, H.D. Arnold, and Colpitts being prominent among the group of brilliant American scientists who joined with Carty in his great undertaking. While much had been accomplished, much still remained to be done, and the various contributions had to be co-ordinated into a unified, workable whole. In large part it was Carty's task to direct the work of this staff and to see that all moved smoothly and in the right direction. Just as the telephone was more complex than the telegraph, and the wireless telegraph than the telephone, so the apparatus used in wireless telephony is even more complex and technical. Working with the intricate mechanisms and delicate apparatus, one part after another was improved and adapted to the task at hand.

To the devices of Carty and his associates was added the extremely delicate detector that was needed. This was the invention of Dr. Lee de Forest, an American inventor and a graduate of the Sheffield Technical School of Yale University. De Forest's contribution was a lamp instrument, a three-step audion amplifier. This is to the wireless telephone what the coherer is to the wireless telegraph. It is so delicate that the faintest currents coming through the ether will stimulate it and serve to set in motion local sources of electrical energy so that the waves received are magnified to a point where they will produce sound.

By the spring of 1915, but a few months after the transcontinental telephone line had been put in operation, Carty had his wireless telephone apparatus ready for extended tests. A small experimental tower was set up at Montauk Point, Long Island, and another was borrowed at Wilmington, Delaware. The tests were successful, and the experimenters found that they could talk freely with each other. Soon they talked over a thousand miles, from the tower at Montauk Point to another at St. Simon's Island, Georgia. This in itself was a great achievement, but the world was not told of it. "Do it first and then talk about it" is the maxim with Theodore Vail and his telephone men. This was but a beginning, and Carty had far more wonderful things in mind.

It was on the 29th of September, 1915, that Carty conducted the demonstrations which thrilled the world and showed that wireless telephony was an accomplished fact. Sitting in his office in New York, President Theodore Vail spoke into his desk telephone of the familiar type. The wires carried his words to the towers of the Navy wireless station at Arlington, Virginia, where they were delivered to the sending apparatus of the wireless telephone. Leaping into space, they traveled in every direction through the ether. The antenna of the wireless station at Mare Island, California, caught part of the waves and they were amplified so that John Carty, sitting with his ear to the receiver, could hear the voice of his chief. Carty and his associates had not only developed a system which made it possible to talk across the continent without wires, but they had made it possible to combine wire and wireless telegraphy. He and Vail talked with each other freely and easily, while the naval officers who verified the tests marveled.

But even more wonderful things were to come. Early in the morning of the next day other messages were sent from the Arlington tower, and these messages were heard by Lloyd Espenschied, one of Carty's engineers, who was stationed at the wireless station at Pearl Harbor, near Honolulu, Hawaii. The distance covered was nearly five thousand miles, and half of it was across land, which is the more remarkable as the wireless does not operate so readily over land as over water. The distance covered in this test was greater than the distance from Washington to London, Paris, Berlin, Vienna, or Petrograd. The successful completion of this test meant that the capitals of the great nations of the world might communicate, might talk with one another, by wireless telephone. Only a receiving set had been installed at Hawaii, so that it was not possible for Espenschied to reply to the message from Arlington, and it was not until his message came by cable that those at Arlington knew that the words they had spoken had traveled five thousand miles. Other receiving sets had been located at San Diego and at Darien on the Isthmus of Panama, and at these points also the words were distinctly heard.

By the latter part of October all was in readiness for a transatlantic test, and on the 20th of October American engineers, with American apparatus installed at the great French station at the Eiffel Tower, Paris, heard the words spoken at Arlington, Virginia. Carty and his engineers had bridged the Atlantic for the spoken word. Because of war-time conditions it was not possible to secure the use of the French station for an extended test, but the fact was established that once the apparatus is in place telephonic communication between Europe and America may he carried on regularly.

The apparatus used as developed by the engineers of the Bell system was in a measure an outgrowth of their work with the long-distance telephone. Wireless telephony, despite the wonders it has already accomplished, is still in its infancy. With more perfect apparatus and the knowledge that comes with experience we may expect that speech will girdle the earth.

It is natural that one should wonder whether the wireless telephone is destined to displace our present apparatus. This does not seem at all probable. In the first place, wireless telephony is now, and probably always will be, very expensive. Where the wire will do it is the more economical. There are many limitations to the use of the other for talking purposes, and it cannot be drawn upon too strongly by the man of science. It will accomplish miracles, but must not be overtaxed. Millions of messages going in all directions, crossing and recrossing one another, as is done every day by wire, are probably an impossibility by wireless telephony. Weird and little-understood conditions of the ether, static electricity, radio disturbances, make wireless work uncertain, and such a thing as twenty-four-hour service, seven days in the week, can probably never be guaranteed. In radio communication all must use a common medium, and as its use increases, so also do the difficulties. The privacy of the wire is also lacking with the wireless telephone.

But because a way was found to couple the wireless telephone with the wire telephone, the new wonder has great possibilities as a supplement to our existing system. Before so very long it may be possible for an American business man sitting in his office to call up and converse with a friend on a liner crossing the Atlantic. The advantages of speaking between ship and ship as an improvement over wireless telegraphy in time of need are obvious. A demonstration of the part this great national telephone system would play in the country's defense in case of attack was held in May of 1916. The Navy Department at Washington was placed in communication with every navy-yard and post in the United States, so that the executive officers could instantly talk with those in charge of the posts throughout the country. The wireless telephone was used in addition to the long distance, and Secretary of the Navy Daniels, sitting at his desk at Washington, talked with Captain Chandler, who was at his station on the bridge of the U.S.S. _New Hampshire_ at Hampton Roads.

Whatever the future limitations of wireless telephony, there is no doubt as to the place it will take among the scientific accomplishments of the age. Merely as a scientific discovery or invention, it ranks among the wonders of civilization. Much as the tremendous leap of human voice across the line from New York to San Francisco appealed to the mind, there is something infinitely more fascinating in this new triumph of the engineer. The human mind can grasp the idea of the spoken word being carried along wires, though that is difficult enough, but when we try to understand its flight through space we are faced with something beyond the comprehension of the layman and almost past belief.

We have seen how communication has developed, very slowly at first, and then, as electricity was discovered, with great rapidity until man may converse with man at a distance of five thousand miles. What the future will bring forth we do not know. The ether may be made to accomplish even more wonderful things as a bearer of intelligence. Though we cannot now see how it would be possible, the day may come when every automobile and aeroplane will be equipped with its wireless telephone, and the motorist and aviator, wherever they go, may talk with anyone anywhere. The transmission of power by wireless is confidently predicted. Pictures have been transmitted by telegraph. It may be possible to transmit them by wireless. Then some one may find out how to transmit moving pictures through the ether. Then one might sit and see before him on a screen a representation of what was then happening thousands of miles away, and, listening through a telephone, hear all the sounds at the same place. Wonders that we cannot even now imagine may lie before us.

APPENDIX A

NEW DEVELOPMENTS OF THE TELEGRAPH

_By F.W. Lienan, Superintendent Tariff Bureau, Western Union Telegraph Company_