Earth Tevijperatiires at Kimhcrlcy. 



423 



ture from summer to winter for either the maximum temperature or 

 the minimum is much greater for the bare ground than it is for 

 the air. 



TABLE 2. 



Yearly Averages of Temperature. 



Year. 



Black Bulb 

 in vacuo. 



Max. in 

 Shade. 



Min . in 

 Shade. 



Min. over 

 Grass. 



Surface Soil. 



Max. 



Min. 



1897 



1898 



1899 



1900 



1901 



1902 



1903 



1904 



1905 



1906 



139-8 

 136-8 

 137-3 

 138-4 

 138-5 

 136-5 

 137-3 

 137-6 

 139-6 

 138-2 



o 

 80-2 

 78-2 

 78-8 

 80-2 

 78-4 

 78-3 

 79-4 

 78-3 

 79-5 

 78-0 







49-4 



48-7 

 50-8 

 50-9 

 50-1 

 48-7 

 48-5 

 48-9 

 50-1 

 49 1 



o 

 44-7 

 44-5 

 47-5 

 47-3 

 45-8 

 44-3 

 43-6 

 44-1 

 45 1 

 44-3 



o 



98-6 

 99-7 

 103-7 

 103-2 

 105-6 

 105-2 



o 



52-5 

 49-9 

 48-6 

 47-9 

 49-0 

 48-2 



Table 2 gives yearly averages for the same elements as Table 1. 

 There is not any decided agreement between one column and 

 another. That is to say, it does not follow that because the ground 

 averages warmer in any one year, the air will do the same. 



TABLE 3. 

 Monthly Averages of Earth Temperature. 



Month. 



Jan. 



Feb. 



Mar. 



April 



May 



June 



July 



Aug. 



Sept, 



Oct. 



Nov. 



Dec. 



Year 





One Foot. 







Two Feet. 





Four 



Feet. 



VIII. 



o 



XIV. 



XX. 



Mean. 



VIII. 



XIV. 



XX. 



Mean. 



o 



XX. 















o 



o 



o 







80-1 



82-1 



85-4 



82-5 



81-1 



80-7 



81-0 



80-9 



76-7 



80-5 



82-2 



85-5 



82-7 



81-8 



81-3 



81-7 



81-6 



77-8 



74-4 



76-0 



78-8 



76-4 



76-8 



76-4 



76-7 



76-6 



75-8 



67-6 



69-2 



71-3 



69-4 



70-8 



70-4 



70-6 



70-6 



72-2 



58-2 



59-4 



61-5 



59-7 



62-6 



62-3 



62-4 



62-4 



670 



50-2 



51-1 



53-2 



51-5 



55-0 



54-7 



54-8 



54-8 



61-2 



49-4 



50-7 



52-8 



51-0 



53-4 



53-1 



53-3 



53-3 



58-2 



54-7 



56-3 



58-8 



56-6 



57-3 



57-0 



57-3 



57-2 



58-9 



62-5 



64-5 



67-0 



64-7 



63-7 



63-5 



63-8 



63-7 



62-4 



70-2 



72-7 



75-5 



72-8 



70-9 



70-6 



71-0 



70-8 



67-2 



76-0 



78-7 



81-6 



78-8 



76-5 



76-2 



76-6 



76-4 



71-4 



80-5 

 67-0 



82-9 



86-1 



83-2 



80-9 



80-5 



80-9 



80-8 



75-1 



68-8 



71-5 



69-1 



69-2 



68-9 



69-2 



69-1 



68-6 



Six 

 Feet. 



XX 







73- 



74- 



74- 



72- 



69- 



65' 



62- 



61- 



62-6 



65-5 



68-6 



71-4 



68-4 



