Mance: Quarry Industry of Southern Indiana 161 



These costs for the Southern Indiana district would be, with 

 up-to-date-plants: 



Interest on plant and depreciation $2.00 



Repairs, taxes, etc 1 . 30 



Quarry cost or cost of waste stone (15 cents per ton) 4 . 50 



Fuel cost (coal $1.50 per ton) 6.00 



Labor cost 10.00 



Total *. $23.80 



Cost per bushel 4.8 cents. 



There are approximately 27 bushels to the ton of quicklime. 

 A fair estimate of the cost of lime burning in the quarry district 

 of Southern Indiana with the cheap waste limestone as a raw 

 material would be not to exceed $1.50 per ton after all expenses 

 are included. 



In slaking a high calcium lime there is an increase in weight 

 of about 40 pounds to the bushel. Quickhme weighs about 75 

 pounds per bushel. 



Uses of Lime. Lime probably has a greater number of 

 uses than any other mineral product. Approximately one-half 

 of the lime burned in this country is used for structural material, 

 and the remaining half is used for chemical purposes. Different 

 grades of lime have different uses, and, in fact, most grades of 

 the product have som.e special use to which they are best adapted. 

 Some uses require a high calcium lime and some require a slow- 

 slaking lime such as results from the burning of dolomitic lime- 

 stones. The principal uses of lime as a structural material are 

 in lime mortars, and plasters, in gauging Portland cement mortars, 

 concrete, and gypsum plasters, and as a whitewash. Both quick- 

 hme and hydrated lime can be used for these structural purposes. 

 The chemical uses of lime are given in the government reports on 

 the industry as follows: 



Agricultural industry — 



As a soil amendment (either calcium or magnesium lime can be used). 



As an insecticide (either). 



As a fungicide (either). 

 Bleaching industry — 



Manufacture of bleaching powder, "chloride of lime" (calcium). 



Bleaching and renovating rags, jute, ramie, and various paper stock 

 (either). 

 Caustic alkali industry — 



Manufacture of soda, potash, and ammonia (calcium). 

 Chemical industries — 



Manufacture of ammonia (calcium). 



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