ABKASIVES OF NEW YORK STATE 



BY HARRY C. MAGNUS 



In the following paper tlie writer has endeavored to present 

 in collected form the substance of all published matter which 

 has for its subject any of the various abrasive materials found 

 within the limits of New York State. A large amount of 

 material has been obtained from previous publications of the 

 State Museum. The American Journal of Science and Arts, the 

 Scientific American, Mineral Industry^ Transactions of the Ameri- 

 can Institute of Mining Engineers and other scientific and techni- 

 cal publications have also been fruitful sources of reference. In- 

 formation concerning the development of the several industries 

 within recent years has been furnished to the writer by the 

 individuals and companies engaged in the mining and prepara- 

 tion of the various materials; and to these, notably, Herman 

 Behr & Co., Mr F. O. Hooper of North Greek, Warren co., H. H. 

 Barton & Sons Co., the Norton Emery Wheel Co., the Standard 

 Emery Wheel Co., the Pike Manufacturing Co., Mr J. S. Van 

 Etten and the Carborundum Co., he wishes to express his in- 

 ' debtedness for much valuable assistance. 



A list of references on the abrasive materials of New York is 

 appended to this paper under the title of Bibliography. 



Garnet 

 Garnet, though one of the most abundant rock-forming 

 minerals, is found in only a few localities of proper character to 

 be of value as an abrasive. It is mined or quarried in New 

 York State on the southeastern border of the Adirondack region, 

 in Warren and Essex counties, where it appears to be of the 

 common variety, " almandite." In Delaware county, Pa., it 

 occurs near Chelsea in small crystals thickly disseminated 

 through a quartzose gneiss. This deposit about the year 1895 



