SHELBY COUNTY. 



467 



Niagara, Sidney, Dngan's. 



Holcomb's limegtone, Spring- 

 field 



Frey's limestone, Spring- 

 field 



Silicions 

 matter. 



trace. 

 .20 

 .10 

 .10 



Alumina and 



eesquioxide 



of iron. 



1.60 

 .50 



1.70 

 .20 



Carbonate 

 of lime. 



55.00 

 54.40 

 55.10 

 64.70 



Carbonate 

 of mag- 

 nesia. 



42.92 

 44,58 

 43.05 

 44.93 



Total. 



99.52 

 99.68 

 99.95 

 99.93 



It will be seen that there is little to choose between the best Spring- 

 field lime and the Shelby county lime. The former is a little nearer the 

 best markets in Ohio, and enjoys the additional advantage of the compe- 

 tition of several independent lines of railroads leading to the best 

 markets. The Shelby county lime could perhaps be burned a little 

 cheaper on account of the lower price of fuel, but not enough so to over- 

 come the disadvantage before referred to. When it shall be burned more 

 extensively, which will be done when it can find a market at less 

 expense of freight, it will become an important article of commerce 

 between this county and other places. 



Fosdls. — This rock from which the lime is made discloses, when broken, 

 an abundance of fossils, but from the nature of the rock they are not 

 very perfect. There were species of Orthoceras of a large size, a trilobite, 

 viz. : Calymene BlumenbacMi, corals of the genus Fenestella and numerous 

 shells and crinoids and cystideans, whose names I have not been able to 

 ascertain. 



