206 PICTURING MIRACLES 



With the Eastman set of Wratten filters, wave 

 lengths of energy of varying length may be pro- 

 duced and a set of a dozen tests of the subject will 

 give a remarkable change in the detail or contrast in 

 the picture from which the one showing what is de- 

 sired best may be chosen. I would advise those tests 

 being made on each subject. It takes only a few min- 

 utes to expose a few frames with each filter, or com- 

 bination of filters, develop them and compare re- 

 sults. In the Velox prints the wave length is marked 

 under each one. This will improve the monochrome 

 results wonderfully. 



As a colored subject reflects waves of energy also 

 that produce the sense of color in the eye, and as the 

 kind of light under which it is viewed affects our 

 impression of its color, daylight often gives an en- 

 tirely different impression from electric light and 

 the numerous kinds of electric light. It is evident 

 that a color film cannot give true results unless it is 

 balanced for the kind of light for which it was in- 

 tended and then used with that type of light exclu- 

 sively, cutting out other forms. 



Kodachrome film is now made in two emulsions; 

 one the regular Kodachrome which is balanced for 

 sunshine light between the hours of nine and four. 

 Before and after those hours the sun's rays are much 

 redder and the resulting picture is too red on pro- 



