![Pneumatics: two men extracting [?] air from an iron sphere. Engraving, n.d. [17th century?].](https://iiif.wellcomecollection.org/image/V0025429.jpg/full/512,/0/default.jpg)
Wellcome Collection
Pneumatics: two men extracting [?] air from an iron sphere. Engraving, n.d. [17th century?].
Unknown artist
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