ISS 



Table of Pressures Corresponding to Given Heads 

 of Water. (Trautwine.) 



Water at maximum density, 62.425 lb. per cu. ft.=l gram per 

 cu. ft. centimeter, corresponding to a temperature of 4 Centl- 

 grade=39.2 P. 



Pressure in lb. per sq. in.= 0.433607 X head in ft. 

 ft.=62.425 X " " . 



Results of Tests Showing Effect of Sand on 



Strength of Mortars. 

 From "Annales des Ponts et Chaussees." 



