PRODUCERS OF GYPSUM 



71 



the whiter variety of the west will analyze much higher 

 in pure gypsum than the darker and more earthy gypsum 

 of the east end of the belt. It is noted in quarrying the 

 mineral that the dark variety is not usually covered with 

 much rock and can be found at a comparatively small depth 

 by removing the overlying drift, while the white variety is 

 quite generally heavily capped with rock, is found at a con- 

 siderable depth, is not nearly as thick as the dark kind and 

 is worked entirely underground. This is probably due to 

 the inferior solubility of the earthy variety. 



The following parties quarry gypsum in New York state: 



Perrysville, Madison Co. 



Hobokenville, 

 Cottons, " 



Marcellus Falls, Onondaga Co 

 Fayetteville, 



Cyrus Warlock, 



Irving Tuttle, 



R. D. Buttons, 



L. D. Sherman, 



Lansing & Son, 



W. W. Condee, 



A. W. Edwards, 



Richard Rod, 



F. M. Severance, Mgr., 



Robert Dunlop, 



Simon Reals, 



A. E. Alvord, 



Cayuga Plaster Co., 



A. D. Miller, 



Ezra Grinnell, 



Theodore Conover, 



Samuel Weeks, 



J. W. Garbutt, 



Wheatland Land Plaster Co., Mumford, 



Olmstead, Oakfield, 



S. Gilmore, Indian Falls, 



Of these the Cayuga Plaster Co. operates on the largest 

 and most approved scale; their openings are the largest, 

 their deposit is extensive and the work is conducted in 



Jamesville, 



Syracuse, 



Union Springs, Cayuga Co. 



Phelps, Ontario Co. 



Port Gibson, 



Victor, 



Garbuttsville, Monroe Co. 



Genesee Co. 



