336 



in 430 hours at a temperature which Avas between 37° and 42°. averag- 

 ing above 40° F., while the AVaushakum variety required 4(30 hours 

 at the same temperature. 



Sturtevant calculates the sum total of temperatures by three meth- 

 ods, a comparison of w^iich is instructive. His results are in the 

 following table : 



Thermal constants for maize at Genera, N. Y., from ijermination to blooming. 



The dates were : Corn planted May 16. 1883, and May 19, 1884 ; sprouted May 28, 

 1883, and May 26, 1884 ; bloomed July 16 to August 8, 1883, and July 16 to August 26, 

 1884. 



Thermal constants for peas from sprouting to maturity at Geneva, V. Y. 



Peas planted April 21 and May 12, 1883; April 28, 1884 

 6, 1883 ; July 2 to 28, 1884. 



ripened July 10 to August 



