STATE GEOLOGIST. QA 
Fig. 144.—The Normandin Concrete Block Machine. 
Fig. 145.—The Dykema Block Machine. 
The stone manufactured by the Dykema process is made of very wet 
concrete, so wet that it will flow into place around the cores. Mr. Dykema 
claims that by this means he gets a denser conerete and at a considerable 
saving in labor. For work which compares with common brick work, the 
material is “struck” across the top of the mold after filling and troweled, 
but for finer natural stone effects, a surface coat of sand and cement is 
16—S. G. 
