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... I hold in possession at present a hair-ball being one of two, weighing1 half an ounce each were lately found in the stomuch of a calf a few months o!d. It may be some advantage to farmers and cattle-breeders to know that the like may he frequently produced by the ca!f licking its skin, co lecting it niouihful of its hair, and swallowing it, the action of the stomach compacting and moulding the ...