126 



BOTANICAL GAZETTE 



[august 



trated aqueous solution of corrosive sublimate and then duly 

 washed in sterile distilled water. The record is given in table XV. 

 Upon opening the flasks, the wheat was found to be quite sweet and 

 free from mold. The 191 1 seed showed practically 100 per cent 

 germination. The 1907 seed, on a rough estimate, showed only 60 

 per cent germination, 

 ously. 



The next test was made upon four sets of wheat seeds, from the 

 same source as the preceding and of the same ages; 30 grams of 

 seed were used in each lot, and all were carefully washed with an 



Both lots of seedlings were growing vigor- 



e> 



Fig. 14. — Oats in soil: A> no. 339; B, no. 444 



room 



and rinsed as usual with sterile water. As the results show, the 

 copper sulphate solution was quite ineffective as an antiseptic. 



*-+* 



X\ 



As these last temperatures indicate, the seed was too badly 



mold (Mucor) to give the experiment 



nificance than this, 



that germinatin 



•*- 



as well as 



cha 



hich may 



acteristic; and if the seed under test does not 

 show this temperature, or one not far removed from it, one is justi- 

 fied in concluding that there is something wrong with it. If the 



