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Specification of Julius Jeffreys : climatic apparatus. Public Domain Mark. Source: Wellcome Collection.
Contains: 10 images
Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Specification of Julius Jeffreys : climatic apparatus. Public Domain Mark. Source: Wellcome Collection.
Patent for a device functioning along the lines of a respirator. Its actual intented aim is not made clear.
Location | Status | Access | |
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Closed stores Pat. vol. 30 |
Location | Access | ||
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Closed stores Pat. vol. 30:33 |