Slates. 143 



shale interstratified with the slate. The work of pumping and 

 hoisting is done by steam power. Roofing and tile slate are pro- 

 duced. The red-slate outcrop is traceable north from the quarry, 

 up the hill to the road and thence onward. 



The East Whitehall slate is noted for its bright, cherry-red color, 

 its fine, homogeneous texture, and its freedom from pyrite. As 

 compared with that of the Granville range or vein, it is brighter in 

 color, it is worked more easily, and it is considered by slate men to 

 be superior for roofing material.* The vein is more persistent and 

 uniform in character than the latter. The output of these Hatch Hill 

 quarries varies from year to year. In 1887, they produced about 

 1,500 squares of roofing slate besides the sawed stock. It sells for 

 $10 per square, delivered on cars or boat ; and there is a steady 

 demand for it. 



„ v * It should be stated here that the East "Whitehall quarries are nearly twice as 

 deep as the quarries in the Granville red slate range or vein, and generally in all 

 districts the quality improves as the quarries get deeper in the rock. 



