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 25
or zinc-bottomed, frame, betwixt whichi and the outer frame there is a space of 6 inches, b.c. Gold-fishpond. d, Footpath. e. Gold or silver fish. /, Pond for trouts, &c. like hoarfrost on its glass, and the plants within maintain ahealthy appearance. Geraniums, cinerarias, heliotropiums,… … Fig. 2. Section. a. Inner zinc frame. b, Outer frame. c. Small pond for gold or silver fish, d, Footpath. which are gold and silver fish. In summer the water directlyfrom the well would continue at about 47° (too cold for the fish);and that it may acquire a higher temperature before it reachesthese…