Arizona republican., 1912-05-01
INFORMATION
 ABOUT CEMENT
Consumption, Producing and Marketing of Article of Commerce Are Treated in This Report

Cement production, consumption, and eXportation are showing remark able increases in the statistical rec ords of the United States, as shown
 by figures of the bureau of statistics department of commerce and labor While the importation shows an equal- ly remarkable decline The mantitv produced, according to figures of the bureau of statistics presented in it's statistical abstract, just issued. has grown from eight million barrels in 1890 to seventeen million in 1900 and SeVenty-eight million in 1910, the val ue has increased from six million dol lars in 1890 to thirteen million in 1900 and siXtyninc million in 1910 Mean time the figures of imports and eX- ports show equally striking changes The quantity of cement exported has grown from 76055 barrels (of 380 pounds) in 1900, valued at $163162, to 2,971,474 barrels in 1911, valued at $4349,29O; while the figures for the nine months ending with March in- dicate that the total for the fiscal year 1912 will considerably exceed, in both quantity and value, that of 1911 and will probably amount to more than three million barrels, or forty times as much in 1912 as in 1900 with a value of more than five mil lion dollars as against $163, ,162 in 1900 On the import side the de- cline has been as rapid and striking as the increase on the export side The quantity of cement imported in 1907 was 1.123, ,763, GAO pounds, but by haI Fol D 1.. and in the fiscal year 1912 seems likely to fall below fifty million pounds, or less than one-twentieth of the imports of 1907.
 The United States is apparently leading the world in the production of cement for industrial purposes. The latest figures available in the bureau of statistics with reference to pro duction in various parts of the world places the production in Germany at about thirty million barrels, or con- siderably less than half that of the United States. and that of England, slightly less than twenty million bar rels. Of the seventy eight million barrels produced in the United States in 1910 a very large proportion is consumed at home. the exports for that year being but about two and q half million barrels. The total consumption in the United States, ac- Cording to the best available figures, has grown from about twenty mill lion barrels in 1900 to seventy-four | million in 1910.
 The cement in question. which is chiefly of the class designated as Portland" cement, iS, according to a statement by the geological survey. | produced by burning a finely ground | artificial mixture containing essen tially lime, silica, alumina. and iron
 oxide in certain definite proportions. | This combination is made by mixing 1 slag for the clay or shale The clay,
 or it's equivalent, furnishes silica,
 alumina, and iron oxide. Impure | limestone. called cement rock" in which all the ingredients are present
 in nearly the proper proportions, is
 also much used. The product of the | burning is a semifused mass called
 "clinker," which is finely ground and
 after such grinding, the powder i (Portland cemenD will set under water
 Pennsylvania is by far the largest | piOuutti ol ttlIlcIll, dDOuI OIlt- lllli u
 of the seventy eight million barrels
 produced in 1910 being the product of
 that state, the states following next in order of production being Indiana. ! Kansas, Illinois, Missouri, New ter Sey, Michigan and New York.
 The cement industry, according to the census of 1910. showed number of
 establishments, 135; capital invested $1S7, ,39S,000; number of wage earn
 CTS, 26,775; wages paid, $15,320000; cost of materials. $29,344,OOO; value of products, $63, ,2O5, ,00O; value added by manufacture, (value of products less cost of materials) $33,S61,0 ,000