X-RAY MOTION PICTURES 147 



development when I started, but in each recurring 

 picture I got the same results prolonged life of the 

 blossom. I spoke to Dr. Harper Goodspeed, who had 

 discovered that passing X-rays through seed, pro- 

 duced mutations, or new forms of plants, perhaps as 

 many as seventy to the hundred, while in natural 

 life only one in one thousand is found. He was much 

 interested, and we planned a series of controlled 

 experiments to see if in each case we would get the 

 same result prolonged life. 



The camera was at this time running on the frac- 

 tured bones in the legs of two rats. Dr. Evans, the 

 discoverer of Vitamin B at the University of Cali- 

 fornia, had operated before his class on the rats. The 

 young lady students as nurses had given the anes- 

 thetic, and he had fractured one bone in each leg, 

 and I had the rats, Peter and Paul we named them, 

 in lead tubes to protect their bodies from the X-ray, 

 with their legs fastened to splints, so they were 

 held in one position. I had been making exposures 

 every fifteen minutes day and night for thirteen days, 

 hoping to show the actual knitting of the bones. By 

 this time I had found a way to open the camera every 

 day and take out the exposed film for development. 

 In this way I was able to watch the result of the ex- 

 periment. The fractured bones did not meet as they 

 should, but overlapped a trifle were off-set. The 



