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 464
served turned upa little (g), the object of which is to pre-vent dirt or air bubbles from entering; airor steam in the siphon greatly impedingthe circulation, ami requiring in somecases to be removed by what Mr.Fowlercalls air plugs. From this application ofthe Thermosiphon, any person of… … 97