Atkins — Factors affecting Hydrogen Ion Concentration of Soil. 409 



Table III — continued. 



It should be noted that the Dartmoor drainage water of the K. Yeahn is 

 at a lower pH value in November than in May or October. This is probably 

 due to the fact that in a rainy month it more nearly approximates to rain- 

 water, and contains less calcium bicarbonate. The decay of leaves and the 



