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- n. Plural form of buhrstone.
Sorry, no etymologies found.
All seed-eating birds are also gravel-eaters; and the pebbles and gravel they eat are mostly silex, or the material from which our best buhrstones are made.
These pass into the gizzard, or pyloric division of the bird's stomach, where they are utilized, the same as we utilize our buhrstones.
_Millstones and buhrstones_, used for grinding cereals, paint ores, cement rock, fertilizers, etc., are produced chiefly in New York and Virginia; partly because of trade prejudice and tradition, about a third of the American requirements are imported from France, Belgium, and Germany.
The county of Montgomery, Prof. Emmons says, can furnish buhrstones of the best quality, enough to supply the whole country.