STATISTICS OF THE AMERICAN INDUSTRY. 



291 



"The single cement plant in North Dakota has a production which 

 for 1903 has been combined with that of the only plants producing 

 natural cement in Kansas and Texas. The other States stand in the 

 table exactly as the reported productions are given. 



"The total results of combined productions are placed against those 

 States which contributed the greater proportion of cement to make the 

 entire quantity." 



The following figures, also taken from the volume on Mineral Resources, 

 issued annually by the U. S. Geological Survey, are of interest in this 

 connection : 



TABLE 143. 



TOTAL PRODUCTION OP NATURAL-ROCK, PORTLAND, AND SLAG CEMENT IN THE 

 UNITED STATES, 1818-1P04. 



"The figures for natural-rock and Portland cement in this table 

 through the year 1896 are taken from a statement made by Mr. Uriah 



