CROPS AND SOIL IMPROVEMENT 



vantages. The buyer of pulverized limestone 

 pays for the haul on 100 pounds of material to get 

 the 56 pounds of lime carried, while 74 pounds of 

 the hydrate furnish the same amount of actual 

 lime, if all of it is a hydrate. While the hydrate 

 contains less strength than the stone-lime, it is in 

 good physical condition for distribution, and the 

 stone-lime must be slaked. The buyer will bear 

 in mind, moreover, that much of the stone-lime 

 which is burned on farms comes from limestone 

 that is not very pure, and all impurity is waste. 

 Most manufacturers of the hydrate locate their 

 costly plants where the limestone is relatively 

 pure. Prudent business reasons dictate such a 

 course. A careful manufacturer of hydrated lime 

 takes out imperfectly burned and other faulty 

 material with screens. These advantages have 

 some weight, but the fact remains that a ton of 

 pure stone-lime has considerably more acid-cor- 

 recting power than a ton of the hydrate. 



Stone-lime. Stone or lump-lime is composed 

 of the 56 per cent of a pure limestone that gives 

 value to the limestone. Forty-four pounds of 

 waste material were driven off in the burning. 

 Where railway or wagon hauls are costly, the 

 purchase of stone-lime is indicated. There is 



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