BRICK YARDS 



239 



Experiments have also been made with the Niagara shale from 

 Medina, N. Y. Sample lots were made into brick and then tested 

 in the crushing machine, and gave very good results. 



In the manufacture of fire brick the method of hand-molding 

 and repressing are no longer used, but the bricks are molded in 

 a soft mud machine. The time of manufacture is considerably 

 lessened thereby as is also the selling price. 



These are the principal changes which have occurred. There 

 has been a favorable advance in all branches of the industry in 

 this State. 



