The figures may be appropriately colored, and the back of the cardboard disc should be painted a dark color, or covered with a piece of dark surfaced paper before cutting the perforations. * * * * * DESCRIPTIVE ZOOPRAXOGRAPHY. An Elementary Treatise on Animal Locomotion, BY EADWEARD MUYBRIDGE. ------ Illustrated with twelve consecutive phases--occurring during a single stride--of each of the six regular progressive movements of the horse, traced from the results of an investigation made by the Author for the University of Pennsylvania. 12 mo. bound in cloth. Price in the United States, One Dollar; in Great Britain Four Shillings and Three Pence. Sent upon receipt of price, free of postage to any country within the Universal Postal Union. EADWEARD MUYBRIDGE, University of Pennsylvania, Philadelphia, U. S. A. Or 10 Henrietta Street, Covent Garden, London. End of Project Gutenberg's Descriptive Zoopraxography, by Eadweard Muybridge