842 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



Nachet's Photographic Microscope for Instantaneous Photo- 

 graphs. — This (fig. 161) is an ingenious arrangement for taking 

 instantaneous photographs of living microscopic animals, and is 

 based on the principle of M. Nachet's double-bodied Microscope. 



Over the objective (fig. 162) is placed a prism, which prevents 



Fir, 1G1. 



any of the rays from the object passing to the camera (which is sup- 

 ported on four pillars above the Microscope), and diverts them into 

 the inclined body-tube fitted with an ordinary eye-piece. The 



