F'ebruary 7, 1 890. J 



SCIENCE 



85 



Prussia, who has taken thousands of pictures of flying birds, 

 running horses, jumping men, etc., all admirable for their 

 perfect ' 'technique, ' ' and for the great artistic tact and scientific 

 skill with which the moments of exposure had been chosen. In 

 these pictures the characteristic positions peculiar to different 

 motions are well presented. Many of them at first appear abso- 



walking man, as many views as possible in equal intervals o 

 time, and he succeeded admirably in his undertaking. He was 

 able to observe in this manner even the fastest motion, for 

 instance, the hurdle-jump of a racing horse, which occupiee 

 only seventy-two one-hundred ths of a second, and in this short- 

 time made twenty-four pictures of the different positions Id- 



instantaneous PHOTOGRAPHS OP AN ATHLETE THROWING A JAVELIN. 



lutely unuatural, because the eye has never been able to observe 

 them. 



These pictures produced rich and important material for the 

 study of motion, but Mr. Anschuetz succeeded in making his ex- 

 periments more valuable by obtaining whole series of pictures 

 giving the different phases of motion. He made it his object 

 to get of one period of motion, for instance, of the step of a 



equal intervals. A dozen pictures showing the different phases 

 of position assumed by an athlete in throwing a javelin, 

 reproduced from instantaneous photographs taken by Sir. 

 Anschuetz, are given on this and the preceding pages. 



Mr. Anschuetz next constructed an apparatus which he called 

 the electric tachyscope, in which he was financially assisted by 

 the German Government. In this instrument the series o 



