John A. True, and Jonathan W. Morrill, the former of Newhuryport, and the latter of: Hampton Falls, Mass., have invented a useful improvement in a '; Bow Yoke Fastener," for which they have taken measures to secure a patent. The invention relates to a new mode ol securing the bows in ox yokes, and at the same time making them capable of adjustment, so as to suit all sized oxen. A spring catch is inserted into one side of the bow hole, and permanently secured in the same. In combination with the ox bow, which has se-veralnotches cut in one of its sides near one of its ends, into which notches the spring catch projects and holds the bow firmly in its place—the several notches allow the bow to be adjusted to suit all sized oxen.