Chapter C: F. Jenkins

having proved his fitness has been duly received
into The American Projection Society Inc. as a
Honorary Member, and is entitled to all rights
and privileges as such.

In Witness thereof the Executive Officers of the Chapter
have hereunto affixed their signatures.

President

Secretary

Treasurer

Date June 12, 1924

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The Jenkins High Speed Camera

This camera was designed for the study of high speed motions; i.e., the flight of birds, recoil of guns, the impact of shell on plate, muscular activity of athletes, airplane behavior, mechanical motions, etc.

The normal rate of exposures is 1,000 to 3,000 pictures per second (4,000 pictures per second have been made).

It uses standard motion picture super-speed negative film. Prints from these negatives are made in any standard motion picture printer, and developed in the usual way.

The prints may then be projected in any standard motion picture projecting machine, giving an apparent reduction of 100 to 200 times in the speed of movement of the object photographed, and therefore easily studied.

The camera is fitted with 48 Zeiss Tessar lenses, F-3.5 and 2″ focus, and is driven by an automobile starting motor.

It weighs approximately 100 pounds, and therefore easily moved from place to place. (Weight of two 6-volt automobile batteries additional.)

Sunshine is adequate for illumination. If artificial illumination is employed, it should be equal to sunshine.

(NOTE: The explanation of the unusual speed possible with this camera lies in its lens system, for each lens may work as much as 150 per cent of the time; that is, the exposures overlap.)

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The Genesis of Radio

_A Broadcast from WRC, November 20, 1924_