COLOR 



171 



Red Yellow Green Blue Indigo Violet 

 Fig. 17.— Curves Showing Synthetic, Thermal and Disintegrat- 

 ing Effects of the Regions of the Solar 

 Spectrum. After PfefiFer. 

 Synthesis. Heat. Disintegration. 



a B C 



Fig. 18. — I. Spectrum of Chlorophyll with Seven Ab- 

 sorption Bands. The two in the red-yellow between B and D, 

 and the three in the blue-violet, beyond F, blended in the dia- 

 gram, are the most important and characteristic. 



II. Spectrum of Amaranth-red. All the rays except those 

 falling between B and D have been absorbed. 



HI. Spectrum of Autumnal Color of Leaves of Ampelop- 

 sis. All the rays except a part of those falling between C and D 

 have been absorbed. 



