peratures and continued beyond the actual estimations by 

 extrapolation. At each température the assimilation-esti- 

 mations were four in number, of one liour's duration each, 



no 



6S0 

 6^0 

 600 

 S60 

 520 

 ^<P0 

 ^40 

 iOO 

 360 

 320 

 Z&O 

 240 

 200 

 160 



no 

 so 



40 

 



s' fO" 15" 20" 25" 30° 35° 40' iS" SO'C. 



iw 



Fig. 1. Assimilation-curves, after B 1 a c k m a n. 



preceded by one and a half hour's preliminary heating. 

 In this way the assimilation was found for the first hour, 

 the second hour, the third hour and the fourth hour. The 

 values found at each température for the différent hours 

 of warming are ail plotted in the same diagram; for this 

 purpose the abscissae axis has been taken as time axis 

 and for each température the ordinate ofthat température 



