664 



CEMENTS, LIMES, AND PLASTERS. 



This would be itemized about as follows: 



TABLE 247. 

 COSTS OF SLAG-CEMENT MANUFACTURE PER BARREL. 



Min. Max. 



Slag 04 .10 



Lime 07 .12 



Coal 03 .08 



Oil, grease, waste, etc 005 .01 



Repairs 01 .03 



Labor 05 .08 



Superintendence, testing, etc 03 .05 



.23^ .47 



Several American plants have to my knowledge worked quite 

 close to the minimum estimate above given. To this cost should be 

 added, of course, interest on the cost of the plant. If the plant is run- 

 ning steadily this item should not amount to more than two or three 

 cents a barrel. 



Production of slag cement. The following data on the slag cement 

 output of the United States are taken from the volumes on mineral 

 resources annually issued by the U. S. Geological Survey: 



TABLE 248. 

 SLAG-CEMENT PRODUCTION IN THE UNITED STATES, 1899-1904. 



List of references on the manufacture of slag cement. 

 Birk, A. Konigshofer slag cement. Zeits. angew. Chemie., 1900, p. 1060-1061. 



Abstracts in Jour. Soc. Chem. Industry, vol. 19, pp. 1114-1115. 1900. 



Jour. Iron and Steel Institute, No. 2, 1900, p. 508. 



Bodmer, J. J. Mode of subdividing and special use of subdivided blast- 

 furnace slag. Trans Amer. Inst. Min. Engrs. vol. 2, pp. 81-83. 

 Bodmer, J. J. Blast-furnace slag cement. Trans. Amer. Inst. Min. Engr., 



vol. 2, pp. 83-84. 

 Boilleau and Lyon Cost of making slag cement. Municipal Engineering, 



vol. 26, p. 321. 1904. 

 Bonnami, H. Fabrication et controle des chaux hydrauliques et des ciments. 



8vo, 276 pp. Paris, 1888. 



