8o 



CHEMICAL PROPERTIES OF SOIL 



after one hundred and twenty hours, at the end of 

 which time the tubes may, if desired, be cut into pieces 

 10 cm. in length and the percentage of water determined 

 in each portion. 



Fig. 14. — Apparatus for measuring capillarity in soils. 



The experiments should be carried out with the 

 following soils : — 



{a) Sand. 



{b) One part sand, one part loam. 



{c) Loam. 



{d) Clay soil. 



