It has, therefore, been decided to issue a series of One Hundred Plates, which number, for the purposes of publication, will be considered as a "COPY" of the work. These one hundred plates will probably meet the requirements of the greater number of the subscribers. In accordance with this view is re-issued the following prospectus. PROSPECTUS ANIMAL LOCOMOTION, AN ELECTRO-PHOTOGRAPHIC INVESTIGATION OF CONSECUTIVE PHASES OF ANIMAL MOVEMENTS, BY EADWEARD MUYBRIDGE. Commenced, 1872--Completed, 1885. PUBLISHED 1887, UNDER THE AUSPICES OF THE UNIVERSITY OF PENNSYLVANIA. _Exclusively by Subscription_. CONSISTING OF A SERIES OF ONE HUNDRED PLATES, AT A SUBSCRIPTION PRICE OF ONE HUNDRED DOLLARS For the United States, or TWENTY GUINEAS For Great Britain; Or the equivalent of Twenty Guineas in the gold currency of other countries in Central or Western Europe. The Plates are enclosed in a strong, canvas-lined, full AMERICAN-RUSSIA LEATHER PORTFOLIO. Additional Plates in any required number will be supplied to the subscriber at the same proportionate rate; these, however, must be ordered at the same time as the subscription Plates. It was considered inadvisable to make an _arbitrary_ selection of the one hundred Plates offered to subscribers, and with the object of meeting, as far as possible, their diverse requirements, they are invited to make their own selection, either from the subjoined list of subjects, or from a detailed catalogue, which will be forwarded free of expense to every subscriber. The following are the numbers of Plates published of each class of subjects, from which the subscriber's selection can be made:-- Class. Plates Published. 1. Men, draped 6 2. " pelvis cloth 72 3. " nude 133 4. Women, draped 60 5. " transparent drapery and semi-nude 63 6. " nude 180 7. Children, draped 1 8. " nude 15 9. Movements of a man's hand 5 10. Abnormal movements, men and women, nude and semi-nude 27 11. Horses walking, trotting, galloping, jumping, &c. 95 12. Mules, oxen, dogs, cats, goats, and other domestic animals 40 13. Lions, elephants, buffaloes, camels, deer, and other wild animals 57 14. Pigeons, vultures, ostriches, eagles, cranes and other birds 27 --- Total number of Plates 781 Containing more than 20,000 Figures.