Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
s being all disposed in the sameorder, that is, copper, cloth, zinc,—copper,cloth, zinc, and so on. W stands for the wetcloth in the drawing. The terminal plates (copper at bottom andzinc at top) are provided with ears, for theconvenient attachment of wires. The wiresconnecting the terminal plates… … 728. Varieties of voltaic piles.—As voltaic piles do not de-pend upon any particular form or substances, they have been made invarious forms and of various materials They have been made whollyof animal substances, and entirely of vegetable substances, as disks ofbeet-root and walnut-wood in…
Physics · Astronomy
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