MECHANICAL COMPOSITION OF SOILS 



75 



Fig. 21. Fine sand soil, showing the mechanical composition. Each 

 vial contains the proportion of particles of given size found in the samples. 

 Clay on the right; fine gravel on the left. For key to sizes, see Fig. 19 and 

 page 73. 



Fig. 22. Silt loam, showing the mechanical composition. For explanation, 



see Fig. 21 



