562 



CEMENTS, LIMES, AND PLASTERS. 



cement industry, from its inception to the present day, in regard to 

 number of plants, annual output, and value of product. The data 

 used in compiling this table are taken in large part from the annual 

 report on mineral resources issued by the United States Geological 

 Survey. For the years prior to 1890 the figures are to be regarded 

 as merely rough approximations to the truth, but in later years they 

 may be accepted as practically correct. 



TABLE 216. 

 TOTAL PRODUCTION OF PORTLAND CEMENT IN THE UNITED STATES. 



Production of Portland cement by States, 1901-1903. In the table 

 on the page opposite, which is slightly revised * from one published 

 by L. L. Kimball in the " Mineral Resources of the U. S. for 1903", the 

 Portland-cement production of the separate States is given for the 

 years 1901, 1902, and 1903. 



In such; States as have but a single plant their production is com- 

 bined with that of another State, in order that the separate figures of 

 any plant shall not be revealed. In this table the Portland-cement 



* The revision is the correction, in the third column from the right, of the 

 number of plants in 1903, which in the original was evidently incorrect. 





