FIFTH ANNUAL MEE TINQ._ w 35~ 



LIMESTONES AND COAL. 



CHEMICAL ANALYSES BY WILLIAM H, SAUNDERS. 



The following quantitative chemical analyses are of two varieties 

 of limestones from Junction City, and two varieties of coals, found 

 along the line of the Kansas Pacific railroad, in Colorado. Stone 

 No. I is the quality ordinarily used. No. 2 is from a new quarry 

 lately opened. A decided difference will be noticed between the 

 samples. No. 2 is free from pores, and although it has a very con- 

 siderable amount of magnesia in its composition, it is my opinion, 

 based on its compactness, the large amount of silicates present, and 

 its slow solubility in acids, that it will prove more durable than the 

 quality ordinarily used. The color, a light drab, is very fine : 



LIMESTONES. No. I. No. 2. 



Hygrometric moisture escaping at 212° F. 55 .75 



Carbonate of Lime 88.85 67.23 



Carbonate of Magnesia 4. 1 5 17-45 



Sesqui- oxide of Iron and Alumina, mostly Iron 1.20 2.05 



Insoluble Silica and Silicates 5.10 12.20 



Loss 15 ,32 



100.00 100.00 



COAL NO. I. 



Water, hygrometric i i.oo 



Illuminating Gas per lb., 1.64 cub. ft. 



Quality poor 



Tar abundant 



Sulphur 1 .50 



Coke ; 52.00 



Ash 6.18 



Rate of Combustion in open air medium 



or. 



Volatile matter 48.00 



Fixed Carbon 45.82 



Ash 6.18 



100.00 



