"Manual of Testing Procedures for Soils", dated April I962. Essentially 

 this consists of taking a 100-gram aliquot from the saarple and shaking 

 this portion throijgh a nest of sieves. The sieves used are United States 

 Stamdard Sieves Nos. 8, I6, 30, 50, 100 and 200, and a pan. A lid is 

 placed on the top sieve and the complete nest of sieves is shaken for 

 about 30 seconds. The No. 8 sieve is then carefully removed from the 

 other sieves, placed on an extra paai, and vibrated vigorously in a cir- 

 cular motion while being tapped on the side with one hajid. This shaking 

 is continued until all of the material finer than the No. 8 has passed the 

 sieve. When this sieving is complete, the materieil retained is emptied 

 into a pan, and the material that passed through the sieve is placed in 

 the next smaller mesh sieve. This screening procediire is jrepeated for 

 each sieve size and the weight of material retained on each sieve is deter- 

 mined ajid recorded. 



Size distributions of material that passed through the No. 200 

 screen were determined with a hydrometer. 



-13- 



