SCIENCE IN THE INDUSTRIAL WORLD 



machines, and a score of other innovations that have 

 come into the market since that time, are so familiar 

 to the majority of persons that it seems superfluous and 

 unnecessary to dwell upon them here. It will be con- 

 sistent with our purpose to consider, instead, another 

 important though much less familiar field, which may at 

 any time be brought to a stage of practical perfection 

 that will make the present-day methods seem as anti- 

 quated as those of Daguerre do to-day. I refer, of course, 

 to the methods of so-called "color photography." 



PHOTOGRAPHING IN NATURAL COLORS 



To the average layman the idea of the photography 

 of color is probably some method by which the color 

 of objects may be reproduced as correctly and as auto- 

 matically as are the shapes, and it must be stated at 

 once that such a process, while the subject of much 

 search, has never been even partially discovered, nor 

 have scientists been able to discern any course of pro- 

 cedure that would lead to this end. 



A recent writer on the subject has summed up the 

 present status of the photography of color, which, as he 

 states, is "always a compromise." 



"The methods of both the past and the present 

 naturally fall into two classes. The less important 

 division includes methods in which a single homo- 

 geneous surface is employed, while in the larger di- 

 vision the surface is multiple or non-homogeneous. 

 The first is generally an attempt to get as near as pos- 

 sible to the simple color photography" (that is, such 



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