AND AGRICULTURE. 53 



flesh, bones, hair, wool, and the dung and urine 

 of animals. Many kinds of fish are also much 

 used as a manure. 



Blood, as a manure, is best mixed with the 

 general refuse of the manure-heap. It is some- 

 times dried, and applied as a top-dressing, or 

 drilled in with the seed. It is one of the most 

 powerful fertilizers. 



The flesh of dead horses, diseased cows, hogs, 

 etc., and dogs, when decomposed, makes a very 

 valuable manure. They should be buried in 

 soil to which saw-dust or marl is added, or be 

 decomposed by the action of oil of vitriol. 

 Sometimes lime may be advantageously added to 

 the substances to undergo decomposition, whereby 

 all the gases disengaged during that process are 

 absorbed and retained for use. 



Bones are broken and crushed in suitable 

 mills, and sifted into various degrees of fineness, 

 from a coarse dust into pieces of half-inch or inch 

 in size. Bones act most quickly as a fertilizer 



Questions. What are the most important animal ma- 

 nures ? How is blood applied as a fertilizer ? How is flesh 

 best prepared for manure ? How are bones prepared as a 

 fertilizer ? How do bones act most quickly as a manure ? 



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