fast motions, slow motions
- Fig. 14
First photograph of “Direction of Motion.”
The pointed ends of the time spots show the direction of the motion.
- Fig. 15
First photograph showing that fast motions and slow motions of the hands and arms do not convey the same paths or orbits.
from chapter “Chronocyclegraph Motion Devices for measuring achievement,” in Frank Bunker Gilbreth (1868-1924 *), Lillian Moller Gilbreth (1878-1972 *). Applied motion study : a collection of papers on the efficient method to industrial preparedness.
New York, 1919
Harvard copy, digitized April 21, 2008
The Gilbreths’ wikipedia entries, asterisked above — and particularly that for Lillian — are fascinating.
B. F. and L. M. Gilbreth, “Chronocyclegraph Motion Devices for measuring achievement” (1919)