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 341
upon them, on each side, was placed a line of bricks (b h);upon these bricks were laid other flag-stones (c); and thesteam is admitted in the space between [d). In order to ren-der the work firmer, it is desirable to have upright stones [e e)against the sides of the flue, which prevent any…
