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Summary
DescriptionHumboldt gasmask 1799.jpg
Humboldt's first gasmask
Date
Source
English Wikipedia; scanned from: HUMBOLDT, Alexander von. Ueber die unterirdischen Gasarten und die Mittel ihren Nachtheil zu vermindern. Ein Beytrag zur Physik der praktische Bergbaukunde. Braunschweig, Friedrich Vieweg, 1799. 8vo. With 3 engraved folded plates.
Author
Alexander von Humboldt
Permission (Reusing this file)
public domain
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Public domainPublic domainfalsefalse
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https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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1799
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17:24, 11 July 2006
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{{Information |Description=Humboldt's first gasmask |Source=English Wikipedia |Date=1799 |Author=Alexander von Humboldt |Permission=public domain |other_versions= }}
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