532 ANNUAL REPORT OF THE Off. Doc. 



In the production of Natural cement, Pennsylvania produced but 

 190,331 barrels as against 304,598 barrels produced in New York. 

 But ten (10) states produce Natural cement as against twenty-six 

 (26) producing the Portland brand. 



PUZZOLAN CEMENT 



The production of Puzzolan cement, prepared by mixing slaked 

 lime and furnace slag is, like the Natural cement, declining. Of 

 the four (4) plants reported, one of these is in Pennsylvania. As 

 there is but a single plant in Pennsylvania, neither its production or 

 value of its product can, for business reasons, be given. 



CLAY PRODUCTS 



The total value of the clay products of Pennsylvania in 1910 as 

 shown from the reports of the Clay working industries was $22,094,- 

 284. Ohio was the only state whose products exceeded in value those 

 of Pennsylvania. 



Brick, including the common, vitrified and front varieties, were 

 manufactured to the number of 1,101,448,000, valued at |8,578,389. 

 The value of the fire brick produced was |G, 545, 928, or a combined 

 value of all variety of brick, except the enameled, of |15,033,317. 



SLATE 



The value of roofing, mill stock and other slates produced in the 

 United States in 1910 was $6,230,759. The value of Pennsylvania's 

 production was |3,740,806 or nearly 60 per cent, of the whole. Penn- 

 sylvania not only stands first in the rank of producers but her pro- 

 duct exceeds in quantity and value that of all other states com- 

 bined. 



The four counties from which this product is quarried are North- 

 ampton, Lehigh, York and Carbon. The school and blackboard 

 slates are produced only in Lehigh and Northampton counties, be- 

 cause of the fine cleavage of these slates for this particular pur- 

 pose. 



The slate quarried in Carbon and York counties is used for roof- 

 ing purposes, while that of both Lehigh and Northampton can be 

 utilized for both roofing slate and mill stock. 



'& 



TALC 



Talc was mined and shipped by three operators in Pennsylvania 

 whose plants are all in the same vicinity. New Jersey has but a single 

 operator. The combined tonnage of Pennsylvania and New Jersey 

 in 1910 was 13,192 tons, valued at |02,833. ' The greater part of this 

 tonnage was mined in Pennsylvania. 



MINERAL PAINTS 

 Ochre 



The production of ochre in 1910 in this country was 11,711 tons, 

 valued at f 112,445 to which amounts Pennsylvania contributed 3,642 

 tons, valued at $32,254 or 31 per cent, of the quantity and 29 per cent, 

 of the value. 



