![Microscopy: parts of a fly's proboscis [?]. Pen and ink drawing, on tracing paper.](https://iiif.wellcomecollection.org/image/V0024998.jpg/full/512,/0/default.jpg)
Wellcome Collection
Microscopy: parts of a fly's proboscis [?]. Pen and ink drawing, on tracing paper.
Unknown artist
Lettering: Bears number: 50.
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