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 247
aps of zinc andcopper being judiciously placed along the wall, andaround the stem of each tree; the best position, in my Iopinion, would be an angle of 43° with the wall. Sup-pose a b, in the annexed figure, to represent the sec-tion of a wall, c d the strap of zinc and copper, e bthe ground line;… … Fig. 35. Galvanic Plant-Protector. from Snails and Slugs. 225 that that most destructive insect, the Forficula auricularia LinncBus, couldnot pass from under the barrier (c d) without using its wings. I apprehendthey could not hold by their feet to the zinc in its position c d, but wouldfall to the…
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