653 



processes, we will consider here only the utilitarian value of the heated seed. 

 We will mention, as example, an observation made by Bolley\ who found 

 in overheated wheat, stack-burned as well as bin-burned, that the embryo 

 was browned, or entirely killed. If the grains develop at all, the tips of the 

 leaves usually die and the roots have no hair covering. The injured grains 

 have lost their clear color and appear pale or browned. The testa is pale 

 and wrinkled ; the flavor of the grain, as a rule, is sweetish and the germin- 

 ating power, even in grain which looks good, is weakened. 



The injury to the germinating power takes place so much the more 

 rapidly the less ripened the seed was when stored or the less draughty the 

 place of storage, since wind can dissipate the water vapor. According to 

 Jodin's experiments- the use of a drying substance (slacked lime) has 

 proved to be advantageous. 



1 Bolley, H. L., Conditions affecting- the value of wheat for seed. Agric. Exp. 

 Sta. North Dakota; cit. Zeitschr. f. Pfianzenkrankh. 1894, p. 22. 



-' Jodin, v., Sur la resistance des grraines aux temperatures elevees. Compt. 

 rend, 1899; cit. Bot. Jahresber. 1900. II, p. 420. 



