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 471
o arod of round iron of about five eighths of an inch in diameter,running above the ridge board. A platform of slate flags, ^supported by stone pillars ofabout 2J ft. high, receives thestone kerbs, &c., {fg. 83.)and admits of the muck beingremoved wholly or in part,it being at first heaped…