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Specification of William Hibbert : respirator. Public Domain Mark. Source: Wellcome Collection.
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Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Specification of William Hibbert : respirator. Public Domain Mark. Source: Wellcome Collection.
Patent for an apparatus for supplying "pure" air, cleansed with a disinfectant made from magnesium Chloride, bromine and chloride of zine.
Location | Status | Access | |
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Closed stores Pat. vol. 31 |
Location | Access | ||
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Closed stores Pat. vol. 31:24 |