Chapter V: Part 5

THE SEVEN-MILE TUNNEL THROUGH THE ALPS.--Dr. Granville says: "To give at once some idea of the boldness of Chev. Mons' undertaking, we may, in the first place, state that in its progress the tunnel must pass under some of the most elevated crests of Mont Cenis,--one, in particular, where there will be 4,850 feet of mountain, capped with eternal glaciers, over head, at the middle of the tunnel, so that not only will the workmen and machinery in construction, and the passengers and trains in transit, be buried to that depth in the heart of the mountain, but all idea of shafts, either to facilitate excavation, or to promote ventilation, must be out of the question. The breath of life itself must be respired, from either extremity, with artificial aid, in shape of currents of fresh air transmitted, and of foul air withdrawn, by mechanical apparatus ever at work, at least during excavation, which is also itself to be effected by machinery of a new and simple nature, worked by water-power of mountain streams whereby the trains are also to be run through the tunnel, which ascends, from the northern or Savoy side, at Modane, all the way to its exit at Bardonneche, with a gradient equal to 19 in 1000. The machine, once presented to the rock, projects into it simultaneously four horizontal series of sixteen scalpels, working backward and forward, by means of springs cased in, and put in motion by the same water power. While these are at work, one vertical series on each side works simultaneously up and down, so that together they cut out four blocks, or rather insulate four blocks on all sides, except on the rock behind, from which they are afterward detached by hand. It has been already ascertained that each of the two machines, at the opposite ends of the tunnel, will excavate to the extent of 22 feet a day, and it is estimated that the whole excavation will be completed in four years. The gallery to be perforated by the machines will be 13 feet wide by 7 feet high, and this once cut through, the bore will be enlarged by ordinary means to 25 feet in width and 19 feet in height, and a double line of rails laid. The estimated cost of this great tunnel is only 13,804,942f. It is to be immediately commenced at the north entrance."

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Medicine has killed as many people as war. Powder and pills are as fatal as powder and ball. Be careful, therefore, how you allow people to shoot them into you.