New York Agricultural Experiment Station. 195 



Table VII. — Atmospheric Temperature, 1912-14. 



1912. 



November 1- 8. 



9-15. 



16-23. 



24-30. 



December 1- 8. 



9-15. 



Average 

 temperature, 

 degrees 

 Centigrade. 



1913. 

 January 



February 



March 



April 



9 



5.5 

 0.5 

 4 

 -1 

 

 1 



May 



June 



July 



16-23 



24-31 



1-8 



9-15 



16-23 



24-31 



1-7 



8-14 



15-21 



22-28 



1-8 



9-15 



16-23 



24-31 



1-8 



9-15 



16-23 10 



24-30 14.5 



1-8 18 



9-15 9.5 



1 

 —2 



4 



1. 

 —8 

 —7 



1 

 —4 

 —6 



6. 



5 



5.5 

 6 

 9 



Average 

 temperature, 

 degrees 

 1913 Centigrade. 



August 1-8 21.5 



9-15 23.5 



16-23 20 



24-31 19 



September 1-8 24 



9-15 24.5 



16-23 18 



24-30 16 



October 1-8 15 



9-15 13.5 



16-23 11.5 



8.5 



24-31 . 



November 1- 8. 



9-15. 



16-23. 



24-30. 



December 1- 8. 



9-15. 



16-23. 



24-31. 



1914. 

 January 



February 



1-8 



9-15 



16-23 



24-31 



1-7 



8-14 



15-21 —10.5 



5 



8. 

 5 

 0. 

 4 

 -1 

 

 1 



1 



2. 



4 



1. 



-1 



-13 



March 



April 



May 



22-28. 



1- 8. 



9-15. 

 16-23. 

 24-31. 



1- 8. 



9-15. 



—7 



—3 



—3.5 



—1 



6 



1.5 



4 



16-23 10 



24-30 9.5 



1-8 13.5 



9-15 12 



Another explanation, offered by Russell, 13 is quite similar to this, 

 but assumes that the hostile organisms suppressed by the low tem- 

 peratures are not bacteria, but larger organisms, probably Protozoa. 

 Russell, indeed, thinks it probable that the bacteria in soil are 

 normally held in check by these protozoa; and that only after soil 

 has been heated, frozen, dried, or treated with antiseptics, can the 

 bacteria multiply to the greatest possible numbers. This theory is 



13 Russell, E. J. The Effect of Partial Sterilization of Soil on the Production of 

 Plant Food. Jour. Agr. Sci. 5:152-221. 1913. 



