rl44 



NEW YORK STATE MUSEUM 



Between this quarry and the De Kalb farm red slate can be 

 traced by outcrops almost continually. A few rods southeast of 

 this quarry and on the same bed are the old " Mettowee or North 

 bend '' quarries which are now idle. 



1 mile farther south are the quarries of the Penrhyn slate co., 

 which extend along the hillside for three quarters of a mile. 

 Plate 33 is a general yiew showing a part of this series of quar- 

 ries. It is taken from a knoll nearly opposite the Middle Gran- 

 ville depot. 



These quarries haye produced purple, green and yariegated 

 roofing material and mill stock, but the company has found it 

 more economic, in the present condition of the market, to pro- 

 cure mill stock in Vermont and to purchase much of its roofing 

 material from the smaller quarries. 



Plate 34 is an interior yiew of the only one of this company's 

 Middle Granyille quarries which was producing. The product is 

 purple, green and yariegated roofing slate. The cleavage dips 

 50° e 10° n and strikes s 10° e. 



This company operates a large mill adjoining the quarries in 

 which slate washtubs, slabs for lavatories, standards and insula- 

 tors for electric machinery, tops for billiard tables, tiles, marble- 

 ized tiles, etc., are manufactured. 



Variegated slate, being one of the cheaper grades, is used for 

 marbleizing. By this process, excellent imitations of various col- 

 ored marbles, Mexican onyx and other ornamental stones are pro- 

 duced. The coloring is a sort of enamel applied to the slate. 



E. Willis, secretary of the company, furnished the following • 

 statement of the company's output of roofing slate for the first 

 eight months of 1898. 



Penrhyn slate co.'s output of roofing slate, Jan. Aug. 1898 



Red slate 



Other colors 



Jan. 



Feb. 



Mar. 



Ap. 



May 



June 



July 



Aug. 



115 squares 



185 

 115 

 80 

 91 

 135 

 120 



50 

 250 

 250 

 285 

 440 

 270 

 300 



124 squares 



