Bone Manure
one of the most important fertilizers in agriculture. The value of bones as manure arises chiefly from the phosphates and nitrogenous organic matters they contain. Bones have long been used as manure in some parts of England, but only in a rude, unscientific way. It was in 1814 or 1815 that machinery was first used for crushing them in Yorkshire and Lincolnshire, and bone dust and dissolved bones are now largely employed as manures, great quan- Great Britain for this purpose. Before being utilized in agriculture they are of bones being now imported into often boiled for the or they contain, which is used in the manufacture of soap and lubricants.