E. J. Russell and A. Applkvard 



41 



Table XI. Showing variation in percentage coinpusition of soil uir 

 taken from different holes on the same plot. 



0-25 

 0-34 

 0-12 



21-13 

 21-09 

 21-12 



78-62 

 78-57 

 78-70 



It has fiequently been found impossible to obtain a sample of air 

 when the steel rod is driven into the clay subsoil and also when the 

 surface of the ground is frozen. The soil was very wet and the pore 

 space comparatively small, and displacement of the soil air apparently 

 could not take place. 



