PART II. PORTLAND -CEMENT RESOURCES OF THE UNITED 
STATES. 
INTRODUCTION. 
In this part of the bulletin the States are taken up in alphabetical | 
order and the available Portland-cement materials of each State are 
described, whether the materials are used or not. When Portland- , 
cement plants are in operation, a brief sketch of the materials used and 
processes followed is also given. These descriptions are based, in the} 
large majority of cases, on the results of the writer's held work in L903i 
and 1904, in the course of which most of the Portland-cement plants 
of the United States were visited. Portland-cement plants are in 
operation in nineteen States (see PI. I). 
The cement resources of the various States can not be described im 
uniform detail. In some States the limestones have been accurately 
mapped throughout their extent, and numerous analyses are available. 
In such cases a more detailed discussion of the cement resources is pos- 
sible than where geologic mapping is less advanced. For this reason] 
the descriptions of some of the States are unsatisfactory, but it would 
have been impossible to adequate^ repair these defects of omission in 
any reasonable length of time. 
References are frequently made, in footnotes, to reports of the 
States or of the United States Geological Survey. Such reports may 
usually be obtained, either free or at a nominal price, on application 
to the officials at the heads of the respective surveys. 
Maps showing the distribution of cement materials have been 
inserted wherever sufficient data were at hand to justify their presen-j 
tat ion. 
PORTLAISTD-CEMEXT RESOURCES OF ALABAMA. 
PORTLAND-CEMENT MATERIALS OF ALABAMA. 
By Eugene A. Smith. 
In Alabama several extensive series of limestones capable of fur- 
nishing excellent raw material for the manufacture of Portland cemeJ 
occur, while the shales and clays necessary to complete the mixtiin 
are found in every county in the State. As a matter of convenience 
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