206 HOW CROPS GKOW. 



TABLE I. Br. 



1st Period, 6,358 Ibs. avoirdupois. 

 2d &quot; 10,603 &quot; u 



3d &quot; 16,523 &quot; &quot; 



4th &quot; 14,981 &quot; 



5th &quot; 10,622 &quot; &quot; 



The Total Weights of Water and Dry Matter for all 



but the 2d Period the material of which was accidentally 

 lost were : 



TABLE II. Br. 



Dry Matter, Water, 



Ibs. av. per acre. Ibs. av. per acre. 

 1st Period, 1,284 5,074 



3d &quot; 4,383 12,240 



4th &quot; 5,427 14,983 



5th &quot; 6,886 3,736 



1. From Tab. I it is seen : That the weight of the live 

 crop is greatest at or before the time of blossom.* After 

 this period the total weight diminishes as it had previously 

 increased. 



2. From Tab. II it becomes manifest : That the organic 

 tissue (dry matter) continually increases in quantity up to 

 the maturity of the plant ; and 



3. The loss after the 3d Period falls exclusively upon 

 the water of vegetation. At the time of blossom the plant 

 has its greatest absolute quantity of water, while its least 

 absolute quantity of this ingredient is found when it is 

 fully ripe. 



By taking the difference between the weights of any 

 two Periods, we obtain : 



The Increase or Loss of Dry Matter and Water 

 during each Period. 



TABLE III. Br. 



Dry Matter, Water, 



Ibs. per acre. Ibs. per acre. 



1st Period, 1,284 Gain. 5,073 Gain. 



8d &quot; 3,099 &quot; 7,106 &quot; 



4th &quot; 1,044 &quot; 2,684 Loss. 



5th &quot; 1,459 &quot; 5,820 &quot; 



In Arendt s Experiment* at the time of &quot; heading oat,&quot; 3d Period. 



