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 94
large ascending pipe, with a smaller retmning pipewithin it, which shall convey the water after it has parted with a portion ofits heat, at an elevated situation, back again to the cistern, and thence intothe boiler; and, fourthly, in the adaptation of smaller pipes for conductingthe heated water… … J section; a is the furnace; h, the boiler; c, the cistern for supplying theboiler, from which the water passes through the tube d; the heated waterrises from the boiler through an inclined tube e, into a chamber f, andthence passes along the flat tube g g. This tube (g) is proposed to be 2or 3 ft.…
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