ON THE TEMPERATURE OF THE SOIL 



69 



TABLE XXXVI. TEMPERATURE OF THE SOIL AT HORNDON 

 ON PLOTS 16 AND 17, AT DEPTHS OF 3 INCHES AND 9 INCHES 



2, 



ai ig 



H 

 I 

 S n 



I 



~ 



I 



13 



H 24 7 21 S 19 Z 16 SO /* 2B S 

 May June July August Sept. Oct. 



FIG. 15. Temperature of the Soil at a Depth of 3 inches on the Untreated and Basic 



Slag Plots at Great Mulgraves, Horndon-on-the-Hill. Soil London clay. 



Plot 16, Untreated Plot 17, Basic Slag . 



