CLAYS or NEW YOKK Til 



Cartilage. The clay deposit, which is several hundred acres in 

 extent and about 5 feet thick, is of a gray color with streaks of 

 brown. The bricks are molded in wet mud machines and put in 

 steam driers. Local market consumes most of the product. 



Potsdam^ St Lawrence co. D. W. Finnimore's brick yard is 

 situated a few rods outside of the village limits. The clay is of a 

 blue color and 6 to 8 feet deep. It is overlain by 1 to 2 feet of 

 dark sandy soil and underlain by gravel. The yard is equipped 

 with a Quaker soft mud machine, and a Kells & Son's dry press 

 machine. The product is used locally. 



Watertown^ Jefferson co. At the north end of the town on 

 Main street are the works of the Watertown pressed brick co. They 

 have about 20 acres of clay, red in color, horizontally stratified and 

 averaging about 20 feet in thickness. It is underlain by Trenton 

 limestone. The tempering sand has to be carted nearly 3 miles. 

 Analysis of the clay shows: 



Silica 64 . 39 



Alumina 14 . 40 



Peroxid of iron 6.00 



Lime 3 . 60 



Magnesia 1.31 



Alaklis 4.66 



Water and organic matter 6.64 



100.00 



I 



The clay is rather tough. It is loaded on cars which are drawn 

 by cable some Y5 feet, up into the machine shed, where it is dumped 

 into a disintegrator. It next goes to the pug mill for tempering, 

 and is molded in a Martin machine. Drying is done on pallets and 

 burning in scove-kilns, the latter occupying about seven days. The 

 consumption is chiefly local. 



Ogdensburg, St Lawrence co. Paige Bros.' yard is on Cedar 

 cor. Canton street, at the southwest end of town. The clav is of a 



