Front of electro-shutters, with positions of panels before, during, and after exposure

Illus. in: The attitudes of animals in motion : a series of photographs illustrating the consecutive positions assumed by animals in performing various movements; executed at Palo Alto, California, in 1878 and 1879, C.
Copyright 1881 by Edw. J. Muybridge.
Title from list of introductory illustrations in book, [p. 1]. (See LC-USZC4-13692).