THE MINING AND QUARRY INDUSTRY I907 



33 



323,32^ short tons, as compared with 262,486 short tons in 1906; 

 191,860 short tons in 1905 and 151,445 short tons in 1904. The 

 output has thus more than doubled within the last three years. 

 It is to be expected from the present general conditions of busi- 

 ness that there will be little if any advance made during the 

 current year. 



Of the total quantity of crude rock reported for 1907, about 

 70 per cent was calcined for plaster. The product of plaster of 

 paris, wall plasters, etc., amounted to 222,502 short tons valued 

 at $820,064, which compares with 163,451 short tons valued at 

 $595^285 in the preceding year. The totals include only the 

 quantities made from gypsum obtained in the State ; some crude 

 gypsum is imported each year from Canada and calcined in local 

 plants. The amount of ground gypsum or land plaster made 

 was 15,441 short tons valued at $38,859, against 20,656 short tons 

 valued at $46,094 in 1906. The portion sold in crude state to 

 Portland cement manufacturers and for other purposes 

 amounted to 91,060 short tons valued at $179,432, against 34,626 

 short tons valued at $58,076 in the preceding year. 



i 



Production of gypsum 





1906 



19 



07 





Short tons 



Value 



Short tons 



Value 



Total output, crude 



Sold crude 



262 486 

 34626 

 20 656 



163 451 



$58 076 



46 094 



595 285 



323 323 

 91 060 



15 441 

 222 502 





$179 432 



3& 859 



820 064 



Ground for land plaster .... 

 Wall plaster etc. made 



Total value 





$699 455 





$1 038 355 







The Akron Gypsum Co. and the American Gypsum Co. made 

 a production for the first time in 1907. Their properties are 

 located near Akron, Erie co., where an excellent quality of rock 

 is found, running as high as 95 per cent gypsum. The former 

 company has a mill and warehouse under construction and w^ill 

 ship its output in manufactured form. The American Gypsum 

 Co. sold the crude rock. 



The Victor Gypsum Co. was engaged in the exploration of a 

 2 



