EXPERIMENT STATION BULLETINS. 611 



are entirely intercepted, the color will influence the warmth of the soil. 

 As to the influence of the meteorological elements on the temperature 

 of these soils, the reader can obtain a better idea by referring to the 

 charts for each month. It will suffice to mention again that these ele- 

 ments are too complex in their behavior and consequently the influence 

 of all of them is not vei-y regular. 



DAILY AND MONTHLY RANGE OF TEMPERATURE. 



In the following tables Avith their respective charts, is shown the high- 

 est and lowest temperature as recorded tri-urnally. What has already 

 been said concerning them under the discussion of the temperature of 

 the different types of soil applies to the present case equally well. 



The tables contain the maximum and minimum temperature, while 

 the charts contain the differences or amplitudes of these maxima and 

 minima temperatures. The air temperature is also the range. All the 

 other weather elements are the averages. 



