A large incrustated Ball found in the Stomach of an Ox at Hallifax. Don. Rev. Nath. Priestley. Another from Yorke. Don. Rev. Jo. Hotham. Upon the Receipt of this, I cut one of them asunder; it is three Inches Diameter; the shining Cover is very thin, and an incredible Quantity of Hair close wrought therein, by the Motion of the Stomach which in these Creatures are very strong and frequent, whereby the Hair is compacted together, as Wool by the Workman's Hand in making a Hat. The Hair of this is brown, whereas another in this Collection (sent from Ireland) is very black. Another from Mr. Ducing, the Coast bright, as though polished. But the largest of all was taken out of a Cow of B. Ainsley's at Leedes; it is above a Foot in Compass, and more compress'd than the former.