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 455
nd roundwith iron. Both plates (a) and blocks (b)are movable on an iron axle, and the sizeof both {tfig. 88.) may be increased or diminished at pleasure.Mr. Bartlett has adopted a diameter of 9 in. for the blocks,and 15 in. for the plates, as may be observed by the dimen-sions inj%. 87. Fig. 89. is… … to the bar d, the use of which scrapers is to clean the roller,and they are of such a length as almost to touch the blocks.Each scraper is protected by a piece of wood (<?), to preventit from being forced back by the earth on the roller. Thesepieces of wood are fastened to the bar^ as the…
