192 CHAP. XXII. EFFICIENCY OF THE SPECTRAL RAYS 



different specimens including the above. On comparing 

 them with those given in Table XXVII., with which they 

 are in general agreement, the advantage of the heterostatic 

 method is clear. 



Table XXIX. — Showing Photosynthetic Activity exhibited 

 by Different Specimens under Different Rays of the Spectrum 



Simultaneous Determination of the Energy of 

 the Rays and of the Induced Photosynthesis 



Determinations were made almost simultaneously by the 

 Bubbler and the Radiometer ; the former gave the photo- 

 synthetic activity and the latter the energy of the rays. 

 The results obtained on March 10, 1923, are given in the 

 following table. 



Table XXX. — Showing the Distribution of Energy in the 

 Spectrum and the Corresponding Photosynthesis 



