The results of this investigation are

Seven Hundred and Eighty-one Sheets of Illustrations, containing more than 20,000 figures of men, women, and children, animals and birds, actively engaged in walking, galloping, flying, working, jumping, fighting, dancing, playing at base-ball, cricket, and other athletic games, or other actions incidental to every-day life, which illustrate motion or the play of muscles.

These sheets of illustrations are conventionally called "plates."

Each plate illustrates the successive phases of a single action, photographed with automatic electro-photographic apparatus at regulated and accurately recorded intervals of time, consecutively from one point of view; or, consecutively AND synchronously from two, or from three points of view.

Each Plate is complete in itself without reference to any other Plate.

When the complete series of twelve consecutive exposures, from each of the three points of view, are included in One Plate, the arrangement is usually thus:—

The plates are not photographs in the common acceptation of the word, but are printed in Permanent Ink, from gelatinised copper-plates, by the New York Photo-Gravure Company, on thick linen plate-paper.

The size of the paper is 45 × 60 centimetres—19 × 24 inches, and the printed surface varies from 15 × 45 to 20 × 30 centimetres—6 × 18 to 9 × 12 inches.

The number of figures on each plate varies from 12 to 36.

To publish so great a number of plates as one undivided work was considered unnecessary, for each subject tells its own story; and inexpedient, for it would defeat the object which the University had in view, and limit its acquisition to large Libraries, wealthy individuals, or Institutions where it would be beyond the reach of many who might desire to study it.

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 issued the following

PROSPECTUS

ANIMAL LOCOMOTION,

AN ELECTRO-PHOTOGRAPHIC INVESTIGATION OF CONSECUTIVE PHASES
OF ANIMAL MOVEMENTS,

BY
EADWEARD MUYBRIDGE.

1872-1885.

PUBLISHED 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 Europe.

This will be for

Austria,
Two Hundred and Ten Florins;

Belgium, France, Italy, and Switzerland,
Five Hundred and Twenty-five Francs;

Germany,
Four Hundred and Twenty Marks;

Holland,
Two Hundred and Fifty Guilders.

The Plates are enclosed in a strong, canvas-lined, full American-Russia Leather Portfolio.

For the purpose of placing all of the subscribers upon an equal footing in regard to cost, a copy of the work will be sent in the portfolio, and packed between boards, to any well-established Institution, or to any subscriber, properly endorsed, to any city in Central or Western Europe, or in the United States.

Freight Charges Paid,

if so requested, to the railway station, with the understanding that the subscription price is remitted within one week of the day of the arrival of the work at the station.

Custom duties, or any other expenses, if any, at the cost of the subscriber.

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.

The Plates will be supplied

Exclusively To Subscribers.

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:—

Should the selection be made from the Catalogue, it will be advisable to give the Author permission to change any one of the selected Plates for any other illustrating the same action, if, in his judgment, the substituted Plate illustrates that action with a better model, or in a more perfect manner than the one selected.

With regard to the selection of Plates, however, it has been found by experience that unless any special subject or plate is required it will be more satisfactory to the subscriber if he gives the Author GENERAL INSTRUCTIONS as to the CLASS of subjects desired and to leave the SPECIFIC selection to him.

Many of the large Libraries and Art or Science Institutions in America and in Europe have subscribed for, and have now in their possession, a complete series of the seven hundred and eighty-one Plates, the subscription price for which is

Five Hundred Dollars

in the United States,

One Hundred Guineas

in Great Britain for the complete series, in eight full American-Russia leather portfolios, or if bound in eleven volumes, each plate hinged, full American-Russia leather,

Five Hundred and Fifty Dollars

in the United States,

One Hundred and Ten Guineas

in Great Britain; or its equivalent for any city in Central or Western Europe.

Subscribers who wish to make use of these Plates for the promotion or diffusion of knowledge, or for artistic or scientific purposes, will be afforded facilities for acquiring working copies by special arrangement with the Author.