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KANSAS ACADEMY OF SCIENCE. 



11. Barytes, or heavy spar. 



12. Zinc, or bleude. 



Carbonate, or cerussite. 

 Silicate, or calamine. 



13. Mica. 



14. Feldspar. 



15. Hornblende. 



16. Spinel, ruby. 



17. Manganese, 



Dendrites, or forest rock. 



18. Quartz, flint. 



Agate. 



Carnelian. 



Chalcedony. 



Jasper. 



Chert. 



Amethyst. 



19. Silver. 



20. Copper. 



21. Lead, galena. 



22. Zinc, blende, or blackjack. 



Calamine. 

 Cerussite. 



23. Sulphur. 



1. Alum is found occasionally in small crystals, in Wabaunsee, Saline, 

 Dickinson, Clay and Republic and some other counties. It is usually asso- 

 ciated with gypsum, sulphur, epsom and Glauber's salts, and results from de- 

 composition of shales. 



2. Common salt is found in springs and marshes, as can be seen in detail 

 in my article on Geology, in the Kansas Agricultural Report, 1879-80, page 

 79. In the southern counties, in the valley of the Cimarron river, it is found 

 in beds, in fine crystals. 



3 and 4. Found wherever we have number one. 



5. Nitre — Nitrate of Potash. This is the substance (especially when asso- 

 ciated with salt and lime) which is called "alkali." It is less common than 

 is usually supposed. We have found it in the western part of the State, but 

 the quantity is not large. 



6. Copperas is found in some of the coal seams, attending the decomposi- 

 tion of iron pyrites. 



7. Gypsum is found, at least in small quantities, in half the counties of 

 Kansas. The most beautiful cabinet specimens are found in the western 

 portion of the State, in the valleys of the Smoky Hill and Saline rivers. It 

 there presents fine, leaf-like clusters of crystals, sometimes as many as one 

 thousand in a sheet. Single clear crystals are most common in Saline val- 

 ley, in Ellis county. Pearlspar and alabaster are rare, the latter of poor 

 quality. In southeastern Kansas, in the valley of the Cimarron, fine trans- 

 parent sheets of selenite are obtained, which sometimes contains a jet black 

 rhombic crystal. 



8. Calc Spar, or Carbonate of Lime, is very common in the carboniferous 

 and middle cretaceous deposits, in a great variety of crystals. The finest 

 specimens are found at the lead and zinc mines in Cherokee county. In the 

 carboniferous deposits the crystals are not large, lining small cavities, and 

 not infrequently the inside of fossil shells. In the western part of Riley 

 county is a stratum of calcareous shale which produces geodes. This deposit 

 continues northeast and southwesterly into the adjoining counties. In the 

 Niobrara chalk deposit it forms veins, filling fissures a foot wide and hun- 



