SPECTRAL ENERGY CURVES OF LIGHT EMITTED BY VARIOUS SPECIES. 25 



ing the color values which correspond with these maxima. A mere glance 

 at the photographic curves of the light of the same insects, obtained with 



.52 4 6 8 .60 2 A-Jd. 



Fig. 1 1 . — Spectral energy curves of firefly and glow-worm. 



different apparatus, as shown in Figs. 7 and 8, should suffice to demonstrate 

 this point. The emission maxima of the various insects studied are shown 

 in Table 3. 



Tabi,e 3- 



