Example $2\mathrm{.}9$: A sample of clay taken from a natural stratum was found to be partially satu$-$

rated and when tested in the laboratory gave the following results. Compute the degree of

saturation. Specific gravity of soil particles $=2\mathrm{.}6$; wet weight of sample $=2\mathrm{.}50N$ : dry weight of

sample $=210N$; and volume of sample $=150c{m}^3.$