) -

Eq. (3.32) gives the percentage of particles finer than a particle diameter D in the mass of soil M

s used in the suspension. If Mp is the mass of soil particles passing through 75 micron sieve

(greater than M s ) and M the total mass taken for the combined sieve and hydrometer analysis, the

percent finer for the entire sample may be expressed as

(3.33)Percent finer(combined), M

Now Eq. (3.33) with Eq. (3.24) gives points for plotting a grain size distribution curve.