The gardener's magazine and register of rural & domestic improvement (1826)
Loudon, J. C. (John Claudius), 1783-1843, A. & R. Spottiswoode, printer, United States. Patent Office. Scientific Library, former owner DSI · London : Longman, Rees, Orme, Brown and Green · leaf 481
as may be seen in fig. 79. or 80. 81 … The key (m) ljin. wide, and halfan inch deep, with correspondingteeth, about three quarters of aninch in depth, is to be placedacross the notches, as in fig. 79.:When the key is slided upwards,the several loose pieces of woodare also raised at the same time:the bolt («) is then set at liberty,as in…
