THE MIXING AND QUARRY INDUSTRY 927 



The Adirondack garnet belongs to the common or almandin 

 variety. It is found associated with hornblende-feldspar rocks a€ 

 crystals that range from small size tip to masses measuring sev- 

 eral feet across. The rocks show great variation in the quantity 

 of garnet present, but only the best or richest portions are exploited. 

 The general procedure consists in breaking down the rock, crushing 

 sufficiently fine to release the garnet, and washing. In many cases 

 the crystals have been so shattered by dynamic forces that they 

 readily part from the accompanying rock after blasting. Some 

 difficulty is experienced in the separation of the garnet mechanically 

 owing to the fact that its specific gravity is but little greater than 

 that of the accompanying hornblende. A special form of concen- 

 trator introduced by the North Creek Garnet Co. has solved this 

 difficulty very successfully. A product is made which carries less 

 than 5% impurities. 



The Adirondack quarries are situated in the Hudson river valley 

 near the Essex-Warren coimty boundary. North Creek is the 

 principal point of shipment. The largest operators in recent years 

 have been the North River Garnet Co., owning quarries a short 

 distance west of North River, and H. H. Barton & Son, with proper- 

 ties on Gore moimtain, a prominent peak southwest of North Creek. 

 Other concerns have been active at various times, but their output 

 has been small and intermittent. 



The production of New York garnet in 1904 amounted to 3045 

 short tons valued at $104,325, about the same quantity as in the 

 previous year. The average value of the product was $34.25 a 

 short ton. The chief demand for garnet is in the wood-working and 

 leather industries. 



The North River Garnet Co. has a mill under course of erection 

 on Thirteenth lake, a few miles southwest of the present plant. 

 The latter will be dismantled and operations confined to the new 

 locality as soon as the equipment can be installed. 



GLASS SAND AND MOLDING SAND 



Deposits of sand suitable for building and constructive purposes 

 occur in almost every section of the State. No attempt has been 

 made to canvass the industry owing to the difficulties which would 

 attend such an investigation. The value of the material, as a rule, 

 is little more than the cost of excavation and transport to market. 



Glass sand is found in great abundance on the shores of Oneida 

 lake and contiguous territory. The principal workings have been 

 in the towns of Rome, Verona, Vienna, Oneida co. and Constantia, 



