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 194
6th, The aperture of the upper pipe should not be more than about1 in. below the surface of the water, or as much as prevents its drawingail-, in an open boiler; but the lower it is below that, the less effect will be N 3 182 Transactions of the Horticultural Society. 27
