ILLUMINATION 



371 



Per Cent of 

 Material. Diffuse Reflection. 



Black paper 05 



Deep-chocolate paper 04 



French ultramarine-blue paper 03 . 5 



Black cloth 01 .2 



Black velvet 00.4 



Effect of Light on Fabrics. We all know how hard it is to match 

 colors by night. The reason for this may be seen in the following 

 table of colors, and the table of colors of lights. It must be remem- 

 bered that this is only a general table, and that some of the delicate 

 shades of modern dyes may reflect and absorb light in a very strange 

 way 



* " Art of Illumination." Bell. 



