FEEBLY HYDRAULIC LIMES: SELENITIC LIMES. 



189 



The results above tabulated are shown diagrammatically in Fig. 3(X 

 It will be noted that the "wet" briquettes gave results exceeding the 

 "dry" in an average ratio of almost 1.6 to 1. 



100 Ibs. 



gO Ibs. 



120 







1 



FIG. 30. Tensile strength of feebly hydraulic limes. 



Compressive strength. Tests on the compressive strength of mortars 

 made * from three English hydraulic limes are given in Table 85. These 

 tests were made on 6-inch cubes kept in air for one year before testing. 



* Proc. Institution Civil Engineers, vol. 62, p. 165. 1880. 



