144 MAINE STATE COLLEGE 



It was noticeable in the investigation made that proximity to 

 running water during two-thirds of the period of experiment only 

 compensated for the loss of moisture resulting from the more 

 open character of the forest where hygrometer No. 4 was situated 

 as compared with No. 3. 



It is designed that this examination of the effect of forests on 

 the moisture of the atmosphere shall be continued. 



Soil Temperatures. 



In this investigation a knowledge of the temperature of the soil 

 at different depths, during the growing season, is sought. 



The periods covered by the experiment are from May 1 to Nov. 

 1, 1889 and from April 1 to Nov. 1, 1890, with thermometers 

 placed in the soil to the depths of 1, 3, 6, 9, 12, 24 and 36 

 inches. 



The thermometers were allowed to remain in place during the 

 winter intervening between the two periods of observation. 



Their location is in the open field, near hygrometer No. 2, in 

 the tract of land assigned to the Station for experimental pur- 

 poses and devoted to farm experiments. The character of the 

 soil is regarded, therefore, as representative of that on which the 

 field experiments by the Station are carried on. 



A summary of results for the two seasons by monthly aver- 

 ages is given in the annexed tables. 



