no PICTURING MIRACLES 



It took some time to make this device, but I saw no 

 other way to do it putting the egg in the small cen- 

 ter ring a tiny bit of cover slip over the top to keep 

 the egg in one position. The reservoir had a con- 

 tinuous change of water, from the beaker from which 

 I led a slip of filter paper to the higher funnel. By 

 regulating the size of the filter paper to the higher 

 funnel, a drop of water could be let into the reser- 

 voir as often as required without moving the egg, 

 which was continuously in contact with the water in 

 the large chamber. 



But this solved the problem of keeping the 

 embryo alive and growing till it hatched four days 

 later and showed, by the lapse-time method, in 

 thirty-five seconds on the screen. In this picture the 

 tandem microscope was used, as the lens, of neces- 

 sity, had to be at considerable distance from the sub- 

 ject, and the necessary enlargement of the film was 

 obtained by enlarging the first image made by the 

 primary microscope. 



The exposures were made at ten-minute intervals; 

 the auxiliary shutter was used, so there was no trou- 

 ble of the water heating, as the light passing through 

 it was only eight seconds every ten minutes. The re- 

 sult was thirty-six feet of film from the start to the 

 hatching, which really should have been made at a 

 faster speed, as the action was faster. 



