AMATEUR PHOTO BY J. T. GRAVES. 



A PORTRAIT STUDY. 

 By Gas Light. 



ACETYLENE GAS IN PHOTOGRAPHY. 



One of the latest illuminants, for photo- 

 graphic use, is acetylene gas, the spectral 

 analysis of which shows identically the 

 same range of colors as daylight. Only a 

 year ago acetylene gas became a commer- 

 cial commodity and it is but a few months 



since experiments were made to test the 

 light for photographic purposes. One of 

 the leading Chicago photographers tested 

 the light and found that excellent negatives 

 could be made with it, with almost the same 

 speed as in daylight. Since then the Camera 



