The caps for these journal-boxes or bearings may be Babbited by this same jig, and they would, of course, exactly conform to the other portions of the bearings in the frame. […] This drilling jig is a negative of the interior of the frame. It has two sets of bearings, c d and e f, which are at right angles to each other, and which set in the longitudinal and transverse bearings that have been made and "Babbited" in the cast frame, and thus steady and hold it.