2 
I regret that we cannot submit analyses of these materials, which would no 
doubt throw important light upon their origin and value, but these are not yet 
completed. An analysis of the finished plaster appears on pages 119 and 159. 
This analysis shows the percentage of silica is low and sulphate of lime (gypsum) 
is high, as compared with other gypsum earth plasters. The red color of the 
original material and finished plaster is no doubt due to iron, though the analysis 
shows the percentage is very low, in fact lower than many of the whiter plasters. 
Nature in this area has apparently been working on a large scale, in a manner 
somewhat similar to that in other gypsum earth areas. Some tests made on this 
material show that it makes a very hard plaster, and it is spoken of with favor 
by those who have actually used the plaster in buildings at Kansas City. 
The mill of this company is located about six and one-half miles from the 
Englewood branch of the Atchison, Topeka & Santa Fe railway. Ifa superior 
quality of cement plaster can be made from this material, the upper Medicine 
Lodge valley will become one of our important plaster districts. The property is 
managed and controlled by very able business men; and, on account of the peculiar 
nature of the deposit, its future will be watched with much interest. 
G. P. G. 
May 8, 1899. 
