49 



minutes; then follows quite a constant increase to the close 

 of the experiment at which time the volume of the contents of 

 the bottle was 6,8 cc greater than at the beginning of the ex- 

 periment. It is probably true that the beans ^obbe used were 

 not of the same variety as used in my experiments. 



Nobbe says that the conclusions of Payen and Wiesner, given 

 above, are not to be denied or neglected, but considers that an 

 intermediate product may arise because of the liberation of 

 heat; this would come before the production of carbon dioxide. 

 Later, perhaps, the process of diffusion, as well as the ac- 

 companying evident dissolving and increase in size might exert 

 an influence on the temperature of the seeds and the medium in 

 which they lie. Nobbe 1 s experiments agree with the conclusions 

 of Payen, in that the change of volume is greater than the 

 change in weight. Since there is sometimes a decrease in size 



it seems indisputable that the figures derived from such ex- 



. . in 



periments express ^exactly the change of relation between vol- 

 ume and amount of water taken up. 



