![Engineering: a polishing machine (top), and another view of a similar machine [?] (below). Etching.](https://iiif.wellcomecollection.org/image/V0024583.jpg/full/512,/0/default.jpg)
Wellcome Collection
Engineering: a polishing machine (top), and another view of a similar machine [?] (below). Etching.
Unknown artist
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