,8 THE POPULAR SCIENCE MONTHLY. 



looking a1 the h< rse in motion. A difference may be marked here 

 from what is the case with man; for, among the pictures of men 



Iking, taken casually or methodically, besides those which are 

 Dover Been with the eye, some also appear which correspond with 

 the -mmon idea of a walking man. The difference depends upon 

 the fact that the moment in which the outstretched fore legs of 

 the racing horse make their longer pause does not coincide with 

 the one in which the backward-thrown hind legs do so. Both of 

 these situations are apt to impress themselves upon the eye and 

 blend in the resultant conception of the racer, but instantaneous 

 photography catches them one after the other. 



An American illustrated journal, in 1882, had a picture of a 

 hurdle-race, in which all the horses appeared in real attitudes, bor- 

 rowed from the Muybridge photographs, as only the fast-receiving 

 plate can see them. Prof. Eder, of Vienna, communicated these 

 suggestive sketches to us in a paper on instantaneous photography,* 

 and a rarer spectacle is hardly conceivable. But when the series 

 of pictures of a periodically moved object taken at sufficiently 

 short intervals, whether it is presented to the eye in the dseda- 

 leum or each picture is illuminated for an instant in its passage, 

 is well projected, the original thought of the Weber brothers is 

 realized : the periodical motion, dissected as it were into differential 

 pictures, is integrated again into an impression of the whole, and 

 the accuracy of the apparently false pictures is demonstrated. 

 The latter experiment has been worked out by Mr. Muybridge 

 himself in his zoopraxiscope, and among us by Herr Ottomar 

 Anschiitz, who manages instantaneous photography with extraor- 

 dinary skill, in his electrical stroboscope. In both methods we 

 see men and horses walking, running, jumping ; but there is still 

 one thing to be remarked that is, that since the length of the 

 passage past the eye of one of the slits of the dsedaleum or of the 

 illumination of the directly visible picture is the same for all the 

 pictures, the appearance of the whole impression of the move- 

 ment is a little different from the view of the same movement 

 itself. That the position in which both feet of the walking man 

 are standing nevertheless preponderates in the impression, is due 

 to tho fact that the motion of the legs becomes slower in ap- 

 proaching this position, so that their rapidly recurring pictures 

 nearly cover one another. 



Tho series of instantaneous pictures of an athlete during a 

 re exercise, which Mr. Muybridge and Herr Anschiitz have 

 are m themselves a rich source of instruction in the rep- 

 resentation of the nude. Herr Anschiitz's stroboscope shows us 

 the Bpear-thrower and the quoit-caster in the different stages of 



* Die Moroentphotographie. Vienna, 1870, p. 10. 



