12 



GROWTH OF WHEAT SEEDLINGS. 



calcium carbonate and brought a relatively high amount of lime into 

 solution as calcium bicarbonate, making the solutions distinctly 

 alkaline. 



SECOND CROP OF SEEDLINGS. 



Reaction of residual solution and weight of crop. After the first 

 crop of seedlings was removed from the pans, more seeds that had 

 been thoroughly washed were sprinkled on the aluminum disks and 

 allowed to germinate and grow as a second crop for five days. 

 Samples were then photographed, as shown in Plates III and IV. 

 The solutions were again made up to their original volumes and 

 titrated with the results given in Table 3. 



TABLE 3. Tit-ration of culture solutions after harvesting the second crop of 



seedlings. 



i For full description of solutions, see p. 6. 



The plants were dried and weighed as in the case of the first crop> 

 the results being shown in Table 4. 



TABLE 4. Weight of second crop of plants. 



