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40:25 ·
In eighteenth-century chemistry this sign was used for magnes. It might refer to a magnet since magnes lapis (magnet stone) meant magnet, and since the structure has two "terminals". |
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40:25 ·
In eighteenth-century chemistry this sign was used for magnes. It might refer to a magnet since magnes lapis (magnet stone) meant magnet, and since the structure has two "terminals". |
