PUBLICATIONS ON CEMENTS. 
The following list includes the principal publications by the United 
States Geological Survey, or by members of its staff, on cementing 
materials. 
Cummings, U. American rock cement. A series of annual articles on natural 
cements, appearing in the volumes of the Mineral Resources, U. S., previous to 
that for 1901. 
Eckel, E. C. Slag cement in Alabama. In Mineral Resources for 1900, 
pp. 747-748. 1901. 
The manufacture of slag cement. In Mineral Industry, Vol. X. pp. 
84-95. 1902. 
Newberry, S. B. Portland cement. A series of annual articles on Portland 
cements, appearing in the various volumes of the Mineral Resources, U. S., pre- 
vious to that for 1901. 
Russell, I. C. The Portland cement industry in Michigan. In Twenty-second 
Ann. Rept. U. S. Geol. Survey, Pt. Ill, pp. 629-686. 1902. 
Taff, J. A. Chalk of southwestern Arkansas, with notes on its adaptability to 
the manufacture of hydraulic cements. In Twenty-second Ann. Rept. U. S. Geol. 
Survey, Pt. Ill, pp. 687-742. 1902. 
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