[WALK v.1 or sb.] A mechanical contrivance or machine, the driving power of which is furnished by the walking of a horse, etc.
1773. W. Emerson, Princ. Mech. (ed. 3), 286. List of Machines &c. … Walk-mill.
1892. Daily News, 15 Nov., 3/1. If there is no wind to supply the necessary power, the leader hopes that twelve men will be able to furnish it by means of a walk-mill, arranged on deck.
