20 



Instructions to Field Parties. 



Clay loam contains from 25 to 55 per cent of silt, 25 to 85 per 

 cent of clay, and more than 60 per cent of silt and clay. 



Clay contains more than 35 i)er cent of clay. 



Sandy clay contains more than 30 per cent of coarse, medium, 

 and line sand, less than 25 per cent of silt, more than 20 per cent 

 of clay, and less than 60 per cent of silt and clay. 



Silt clay contains more than 55 per cent of silt and from 25 to 35 

 per cent of clay. 



The following tal)le contains the same information differently 

 arranged and may prove of more use to some of the field men: 



Scheme of soil classification hased upon the mechanical composition of 



soils. 



