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 626
shelves into boxes (ao)of a sufficient depth for soil, and of any convenientlength. A sort of frame, or square trellis {b b), should be raised a sufficientheight above the boxes, to support mats, for protection against frost andstormy weather. Such boxes would be much better than a sloping bed,…
