142 PICTURING MIRACLES 



X-ray camera. He told me his new camera costing 

 1 10,000 would expose a 14 x 17 plate, move it out 

 of the field, put in another at the rate of sixteen a 

 second. I did not say anything but my mind at once 

 grasped the impossibility of doing this, moving that 

 large plate so quickly and replacing it with another. 

 He realized, of course, that I knew nothing about 

 X-ray work and told me I had better learn first to 

 make still pictures. 



At the General Electric Laboratories I met Dr. 

 Coolridge. I told him what I wanted to do and he 

 advised what kind of tube to get and offered to aid 

 me in every way possible. A month later I started 

 construction. The camera was designed to carry a 

 roll of film 200 feet long and any width up to seven 

 inches. I could not get film of that width perforated 

 as regular motion picture film is, so I had designed 

 an entirely new method of moving it forward and 

 stopping, to take the picture. This did away with 

 the "Loop" and the perforations and I could set it 

 to draw the film a measured distance, stop it and 

 repeat the operation as often as I wished. Later I 

 was granted a patent on the device. 



This enabled me to take a series of pictures any 

 size I wished up to 5 x 7 and as often as required, 

 from twelve a second, which seemed to be its limit 

 of speed, up to thirty minute intervals. The distance 



