18 University Geological Survey of Kansas. 
ven with this high rank, it is important to remember that the 
deposits are merely opened and large quantities remain yet to 
be worked. In the southern Kansas field, where there are miles 
of gypsum, there is but a single mill in operation. 
Nowhere in this country are better gypsum plasters made than 
in Kansas, and these cement plasters find a ready and increasing 
market in the east, even where other deposits have the great ad- 
vantage in freight rates on account of the shorter mileage. 
The writer is indebted to many persons for kind assistance in 
the preparation of this volume. The chemical work is included 
in the chapter by Prof. E. H. 8. Bailey, of the Department of 
Chemistry in the University. 
The officers of the various cement plaster companies have 
given cheerful assistance in the collection of data; and the va- 
rious manufacturers of gypsum machinery have aided with de- 
scriptions and drawings. 
The writer wishes to express his thanks and appreciation for 
these favors, and for the many others which cannot here be 
mentioned, and it is hoped that this report may serve to ad- 
vance in some degree our plaster industry. 
* 
TopEKA, Kan., November 15, 1898. 
