M.w rOBX liUBSUM 



Clay 



53.5 



5.15 



ind A! 24.2 



2.15 



I. oition 14.1 



Is dried oi m pipes, broken to about i— J inches 



in a I' rator; and sent through a Bullock burstone 



mill, which grinds to about 16 mesh. It is then weighed, and 

 mixed with tJ marl as both are shoveled into the chutes lead- 



ing to the revolving mixer. The mixture then goes to the pug 

 mills, and is made into bricks, which are sent to the drying tunnels. 

 The lower tier of these tunnels is heated by direct heat, on the 

 ( himmer system; the upper tier by exhaust steam. 1G dome kilns 

 are in use. From the kilns the clinker goes to an 18 x 30 inch 

 ke crusher; then to dry pans, receiving its final reduction in 

 rtevant rock emery mills. The product is marketed as the 

 Genesee (Wayland) brand. 



Allied products 

 Sand cements. Two companies, under practically the same 

 . • ment, are at present engaged in the manufacture of sand 

 cement. These are the Standard silica cement co., whose works 

 at Loi g bland City were described in detail in Engineering news 

 of April 1(5, 1S0G, and the Glens Falls Portland cement co. At the 

 plant n{ tliis latter company, their Iron Clad cement is used, the 

 sand cement being marketed as the Victor and Adiron- 

 dack brands, the Latter carrying a larger proportion of sand. At 

 the Long Island City plant the Band was first dried in Cummer 

 : then screened, mixed with the cement in the proper pro- 

 portions, and ground in Davidsen tube mills. 



"Natural Portlands." Two funis in New York state manufac- 

 ture, in addition to their natural cements, brands which are mar- 

 • b natural Portlands.' 1 The limestone is fed, without 



