THE MIXING AND QUARRY INDUSTRY I908 29 



purity and market value are secured. Tlie finest grades of crystal- 

 line graphite from the Adirondacks bring from 10 to 20 cents or 

 even more a pound. 



The American mine owned by the Joseph Dixon Crucible Co. 

 has for a number of years furnished most of the graphite obtained 

 in the State. The mine is situated at Graphite near Hague on 

 Lake George. The graphite occurs as disseminated scales or 

 flakes in a quartzite of the Precambric series. The quartzite is 

 quite widely distributed in the eastern Adirondacks, but no other 

 locality has been found where it carries so coarse a flake and at 

 the same time is so free from other scaly minerals. The Joseph 

 Dixon Crucible Co. owns a mine also just north of Hague near 

 the lake shore and on Lead hill west of Ticonderoga, but these 

 were not operated in 1908. The product of the American mine, 

 after the first separation at the local mill, is refined at the com- 

 pany's mill at Ticonderoga. 



The Crown Point Graphite Co. was operative for a short time 

 only during the past year, as it was engaged in building a mill 

 at the mines near Chilson lake, Essex co. The deposit belongs to 

 a difl'erent type than that described above, the graphite occurring 

 in bunches and scattered flakes within beds of crystalHne lime- 

 stone. The process of separation devised by the company is said 

 to consist in crushing the limestone to a powder and recovering 

 the graphite on screens. Where the quartzite is the gangue, the 

 graphite is separated by gravity or flotation methods. The Crown 

 Point Graphite Co. has a finishing mill at Crown Point Center. 



The Glens Falls Graphite Co. made a small production in 1908 

 from the mines at Conklingville, Saratoga co. The graphite is 

 found in a quartz schist, a feldspathic representative of the Pre- 

 cambric sediments. 



Extensive beds of the graphitic quartzites occur near Rock pond, 

 Essex CO., 7 miles north of the American mine, and have been 

 under development by John D. Ely of Crown Point. The work 

 done in the past year has shown the existence of a rich seam, which 

 assays up to 20 per cent carlx)n, and a very large area of lower 

 grade rock. 



The Saratoga Graphite Co. has been recently organized for the 

 purpose of working a deposit near Saratoga Springs. 



GYPSUM 



The production of gypsum is made in the central and western 

 parts of the State, in ]\Iadison, Onondaga, Cayuga, Monroe, Gen- 



