TEMPERATURE OF SURFACE SOIL 



house at Tubingen in Germany, between noon and one o'clock, 

 on every day when the weather was perfectly fine ; the bulb 

 of the thermometer was placed one-twelfth of an inch beneath 

 the surface. The highest temperature thus observed was 

 I 53'5 F.J the temperature of the air at the same time being 

 78. The average of the temperatures recorded for each 

 month of the year, with the average temperatures of the air 

 in the shade taken at the same time, will be found in Table 

 XXVI. In the same table will be found the average midday 

 temperatures observed by Schlibler at Geneva during a single 

 year ; in this case, however, the temperatures were observed 

 every day, and not only in fine weather. 



TABLE XXVI 



MEAN TEMPEKATURES OF SOIL AND AIR AT MIDDAY 

 (SCHUBLER) 



