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 28
, or sides, mayreceive the heating effect of the smoke. By narrowing thetop of the boiler {a), the heat received from the fuel is im-mediately conducted from all points of the bottom surface {b)to the entrance of the pipes (c), through which it is to be cir-culated. In consequence of this, there… … round, or any other description of boiler hitherto in use forheating hot-houses. I shall not trouble you with descriptivedetails of the returning pipes {d d), or of the fire-place andash-pit (ef); but I shall just observe, that the top of theboiler {a) may be covered with a lid of wood, iron, or…
