A one-page dictionary entry from Knight's American Mechanical Dictionary defining the loom harness as the apparatus that shifts sets of warp threads alternately to form the shed. It explains heddles (healds), the terms 'mounting' and 'shedding', and describes a hand-loom shedding mechanism in which the motion of the lathe turns a pin drum to work the treadles. It includes Fig. 2402, a side-elevation diagram of this 'Harness-Motion'.