i h 



Fig. 10. Action of Different Light Rays 

 ON THE Color of Plants. 



a. Red flowered Crassula in sunlight, b. same in darkness, c. Alter- 

 nanthera amoeua full radiation, d. same under red rays, e. geranium 

 leaves full radiation, f. same under blue rays, g. green rays, h. red rays 

 {a-h, after Flammarion). 



