PHYSICAL PROPERTIES OF SOILS 



15 



tremely varied in form. When examined with the 

 microscope they show the same diversity as is observed 

 in larger stones. In some soils the particles are spher- 

 ical, while in others they are angular. The shape 



Fig. 1. Medium Sand X T 50- Fig- 2. Fine Sand X 150. Fig. 3. 

 Very Fine Sand X 150. Fig. 4. Silt X 3?5- Fig. 5. Fine Silt X 

 325. Fig. 6. Clay X 325- 



of the particles is determined by the way in which the 

 soil has been formed and also by the nature of the 

 rock from which it was produced. 



The form and arrangement of the particles are im- 

 portant factors to consider in dealing with the water 



