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39:17 ·
A sign used to denote talc in early chemistry and late alchemy. In Arabic this mineral was called telk. In Germany it is called Marienglas. It is a transparent, chrystallized plaster. |
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39:17 ·
A sign used to denote talc in early chemistry and late alchemy. In Arabic this mineral was called telk. In Germany it is called Marienglas. It is a transparent, chrystallized plaster. |
