F, a horizontal battery of electro-photographic cameras, at any suitable angle to the lateral battery for a series of front foreshortenings.
O, the position of the electric batteries, a chronograph for recording the time intervals of exposures, and other apparatus used in the investigation.
A clock-work apparatus, set in motion at the will of the operator, distributed a series of electric currents, and synchronously effected consecutive exposures in each of the three batteries of cameras.
The intervals of exposures were recorded by the chronograph, and divided into thousandths of a second. These intervals could be varied at will from seventeen one-thousandth parts of a second to several seconds.
The task of making the original negatives was completed in 1885; the remaining years have been devoted to the preparation of the work for publication.
Lateral elevation of some consecutive phases of action by representative horses.
Each line illustrates the successive fallings of the feet during a single stride.
After the last phase illustrated, the feet, during continuous motion, will revert practically to their position in the first phase.
The comparative distances of the feet from each other or from the ground are not drawn to scale; and, in any event, would be merely approximate for the succeeding stride.