Johann Zwelfer
Johann Zwelfer (1618–1668) was a German chemist, pharmacist and physician.
Works
- Herrn Johann Zwölfern Königliche Apotheck Oder Dispensatorium . Endter, Nürnberg 1692 Digital edition by the University and State Library Düsseldorf
gollark: Couldn't you just use... any single board computer?
gollark: Wikipedia's got an explanation, actually.
gollark: I duckduckgoed "ferrite clips" and there seem to be some relevant-looking results.
gollark: <:illum:531316942443642880>
gollark: `(input - 22) * 56` or something, to change 22-40 to 0-1024-ish.
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