COMPOSITION, PROPERTIES, AND TESTS OF PLASTERS. 61 



TABLE 15. 

 RESULTS OF TENSILE TESTS OF PLASTERS, ETC. 



Compression tests and effects of sand. A valuable series * of ex- 

 periments were carried out during 1899-1900 by Profs. Slosson and 

 Moudy on the compressive strength of plasters, both neat and mixed, 

 with varying properties of sand. Most of the material used for these 

 tests was a cement plaster manufactured at Laramie, Wyo., the tests 

 being made before the addition of retarder to the plaster. 



The material was molded into 2-inch cubes and crushed in a Riehle 

 self-registering machine after the cubes had been exposed to the air 



* Tenth Ann. Rep. Wyoming Agric. and Mech. College, 1900. 



