56 



NEW YORK STATE MUSEUM 



predicted by those interested in its development, it has established 

 a recognized place for its products among standard building 

 materials. It was handicapped for a time by the sales of inferior 

 grades of brick, made in plants which were not properly equipped 

 for turning out a first-class product. Some of these brick had a 

 mortar bond and should not have been classed as sand-lime brick. 

 It can be definitely stated that such grades are no longer manu- 

 factured, and that the present output consists of a superior grade 

 with a calcium silicate bond. 



Production of sand-lime brick 



YEAR 



QUANTITY 



VALUE 



VALUE 



A 

 THOUSAND 



OPERAT- 

 ING 

 PLANTS 



1906 

 1907 

 1908 

 1909 

 I9IO 

 I9II 

 1912 



1913 

 1914 



17 080 OOO 



16 610 000 

 8 239 000 



12 683 000 



14 053 000 



15 178 000 



21 231 000 



22 225 000 



17 696 000 



$122 340 



109 677 



55 688 



81 693 



82 619 

 92 064 



133 736 

 143 345 

 in 326 



16 

 60 

 44 

 3i 



88 



05 

 30 

 40 

 29 



STONE 



The products of the stone quarries form a large item in the total 

 mineral production of the State. The last few years have wit- 

 nessed, however, some notable changes in the relative importance 

 of the different branches of the stone industry. The use of cement 

 and terra cotta in architectural work has curtailed the demand for 

 cut stone, so that this branch no longer ocupies the prominent place 

 that it once had. Similarly the market for flagstone and curbstone 

 has fallen off, especially for flagstone, as a result of the favor 

 shown for cement construction. On the other hand there has been 

 a tremendous development of the crushed stone industry, which has 

 practically counterbalanced the declines in the other departments. 

 Altogether the changes that have taken place have meant a loss in- 

 dustrially, since the preparation of crushed stone requires a 

 minimum of labor of the unskilled sort, while the cut stone business 

 once gave employment to large numbers of highly trained workmen. 



The statistics of stone production which have been supplied by 

 the quarry operators throughout the State indicate that the year 



