QUARRY MATERIALS OF NEW YORK IOI 



Washington with the following results, no. i referring to the stone 

 from the Smith property and no. 2 to that at Augur lake. 



Nc. i No. 2 



Crushing strength, pounds a square inch 20,500 18,500 



Specific gravity 2.75 2.70 



Weight, pounds a cubic foot 172 168 



Water absorbed, pounds a cubic foot .51 .49 



Wear (French coefficient) 11. 7 10.4 



Hardness 18 18 



Toughness 13 10 



The physical tests indicate that the material meets all the ordinary 

 requirements of building material. There can be little doubt as to its 

 durability under weathering conditions, though it has not been 

 proved by actual service in buildings. For polished work it should 

 also prove acceptable on account of its rare color. The only draw- 

 back to that use seems to be the presence in some of the polished 

 specimens of minute hairlike fractures visible on close inspection. 

 These are the more apparent by reason of the translucent back- 

 ground, but as evidenced by the crushing strength and absorption 

 do not materially weaken the general structure. 



Quarry of C. B. White, Augur lake 



Along the west side of Augur lake anorthosite outcrops over a 

 large area, forming a broad ridge which breaks off at the lakeside 

 in a line of perpendicular cliffs 100 feet high. It is mostly a light- 

 colored labradorite rock, of medium grain, in general appearance 

 not unlike gray granite. It contains scattered crystals of pyroxene 

 and occasionally some biotite. In places these minerals become 

 sufficiently abundant to give a rather dark tone to the rock surface, 

 but generally they are of subordinate importance. The minor 

 accessory constituents are garnet, ilmenite and a little chlorite and 

 kaolin from decomposition. The anorthosite is undoubtedly a 

 good durable building stone. 



The property owned by Mr White includes a quarry opening 

 which lies on top of the ridge above the lake. The quarry was last 

 worked in 1892; the product was employed in the construction of 

 the Criminal Courts Building in New York City. A large quantity 

 of rough stone, much of it suitable for dimension stone, was left 

 in the quarry. The principal drawback to operations is the long 

 haulage to the railroad, the nearest shipping point being Keeseville, 

 the terminus of a short branch railroad that connects with the 

 Delaware and Hudson line at Port Kent. The quarry is about 5 

 miles in a direct line from the shore of Lake Champlain. 



