250 



NEW YORK STATE MUSEUM 



would amount to practically 360,000 tons, with a value of 

 $20,000,000. The flue dusts and gases produced during the manu- 

 facture of portland cement generally carry a considerable per- 

 centage of the alkalies. It has been estimated that if all the cement 

 plants carrying available potash in the United States could be 

 equipped to produce this material, there would be an annual pro- 

 duction equivalent to approximately 80,000 tons of potassium oxide. 



Materials grouped under the heading of natural cement were 

 produced to the extent of 104,415 barrels, with a value of $51,635. 

 The decline in production of natural cement was very great during 

 1916. In the previous year there was a production of 223,564 

 barrels with a value of $134,138. There were 4 plants in operation 

 with a combined total of 18 kilns. Of this number, 12 were of the 

 continuous type of vertical kiln, having a daily available capacity, 

 under normal conditions, of 90 barrels each ; the others belong to 

 the old style of intermittent vertical kiln of variable capacity. 



The following table gives the statistics of cement production in 

 the State for the period 1897-19 16. The figures prior to 1904 have 

 been taken from the annual reports of the Mineral Resources. It 

 will be noted that the amounts given for the year 191 6 represent 

 shipment rather than production, but the difference is not important. 



Production of cement in New York 



YEAR 



PORTLAND CEMENT 



NATURAL 



CEMENT 



Barrels 



1 Value 



Barrels 



Value 



394 398 



$690 179 



4 259 186 



$2 123 771 



554 358 



970 126 



4 157 917 



2 065 658 



472 386 



708 579 



4 689 167 



2 813 500 



465 832 



582 290 



3 409 085 



2 O45 45I 



617 228 



617 228 



2 234 131 



I 117 066 



1 156 807 



1 521 553 



3 577 340 



2 I35 O36 



1 602 946 



2 031 310 



2 417 137 



I 510 529 



1 377 302 



1 245 778 



1 881 630 



I 207 883 



2 117 822 



2 046 864 



2 257 698 



I 590 689 



2 4 2 3 374 



2 766 488 



1 691 565 



I 184 211 



2 108 450 



2 214 090 



1 137 279 



757 730 



1 988 874 



1 813 622 



623 588 



441 136 



2 061 019 



1 761 297 



549 364 



361 605 



3 364 255 



2 939 818 



292 760 



147 202 



3 416 400 



2 930 434 



274 973 



134 900 



4 495 842 



3 488 931 



287 693 



142 165 



5 146 782 



4 873 807 



193 975 



95 565 



5 667 728 



5 088 677 



232 076 



115 117 



5 219 460 



4 175 528 



223 564 



134 138 



5 603 477 



5 752 809 



104 415 



5i 635 



1897 



1898 

 1899 



1900 

 1901 

 1902 



1903 

 1904 

 1905 



1906 



1907 



1908 



1909 



1910 



1911 

 1912 



1913 

 1914 



1915 



1916 



