File:Humboldt gasmask 1799.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:24, 11 July 2006 | ![]() | 552 × 610 (146 KB) | Sakvaka | ((Information |Description=Humboldt's first gasmask |Source=English Wikipedia |Date=1799 |Author=Alexander von Humboldt |Permission=public domain |other_versions= )) |
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