Manchester Meuwirs, Vol. hi. (191 2), No. 0. 



7 



breaking stress in this case was 21 59*4 lbs. per 

 sq. inch. The broken pieces appeared to indicate 

 that the specimen had fractured roughly along a 

 parallel of latitude just as the longitudinal cracks 

 reached the reinforcements, the whole collapsing 

 instantaneously. 



Table sJioiving Vertical Breaking Loads in Tons and 



Breaking Stresses in Pounds per square inch. 



Plain. 



Reinforcicd at Base. 



Reinforced both at Base and Crown. 



Summary of the results. 

 (i) The longitudinal cracks in meridional planes only 

 develop under considerable loads and extend 

 slowly. As concrete is understood not to be able 



