Coefficients for First Loading of Concrete. (Marsh.) 



Considere advocates 2,700,000 Ib. 



Results Deduced by Prof. Hatt from Tests made at 



Watertown Arsenal on Elasticity of 



Concrete Under Compression. 



These tests made on cylinders 8 in. in dlam. and 12 In. 

 high show that broken stone concrete has a greater -c 

 than gravel or cinder concrete. 



