THE MINING AND QUARRY INDUSTRY I9II 7 



The lessened activity in the building trades also affected adversely 

 the quarry industries which reported an aggregate value of 

 $5,455,312 for their products, as compared with $6,193,252 in 1910. 

 The total was divided acccording to various uses into building stone 

 $632, 085; monumental stone $90,468; curb and flagstone $443,036; 

 crushed stone $2,928,740; other uses $1,360,983. The output of 

 slate, millstones and limestone used in making hydraulic cement is 

 not included in these totals. All kinds of stone were quarried less 

 extensively last year, though the falling off was particularly notice- 

 able in granite, sandstone and marble which are used largely for 

 structural purposes. The production of limestone and trap showed 

 little change from the totals recorded in 19 10. 



For cement manufacturers the year was very unsatisfactory in 

 that it witnessed the lowest prices known to the trade. That the 

 output in the State should have been well maintained in the circum- 

 stances testified to the sound basis on which the local industry has 

 been established. The aggregate production amounted to 3,691,373 

 barrels, as compared with 3,657,015 barrels in 1910. Portland 

 cement constituted the main part of the total, in actual figures 

 3,416,400 barrels valued at $2,930,434. The natural cement mills 

 contributed only 274,973 barrels, with a value of $134,900. Eleven 

 plants in all were active, or 1 less than in 19 10. 



The production of salt from the mines and wells of the State 

 amounted to 10,082,656 barrels, a little under the total of 10,270,273 

 barrels in 1910, but larger than that of any other year. The value 

 of the output was $2,191,485. Rock salt was obtained from 2 mines 

 in Livingston county, the other producers to the number of 28 

 obtaining salt from brine wells situated in Onondaga, Livingston, 

 Schuyler, Wyoming, Genesee and Tompkins counties. 



Gypsum, a material used principally for the manufacture of 

 plaster of paris and wall plaster, is the basis of a large industry 

 which has developed practically in the last 10 years. It is found in 

 a belt which extends from Madison county on the east to Erie 

 county, associated with the same rocks that yield the rock salt. The 

 output last year, mainly by underground mines, was 446,794 short 

 tons and the value of the marketed products totalled $1,092,598. In 

 the year 1910 the output was reported as 465,591 tons with a value 

 of $1,122,952. 



The combined value of petroleum and natural gas, the only repre- 

 sentatives of the class of mineral fuels obtained in the State, 



