Chemistry: two types of burning-glass, and a glass-polishing machine. Engraving by A. Bell.
Wellcome Collection

Chemistry: two types of burning-glass, and a glass-polishing machine. Engraving by A. Bell.

Unknown artist

CC0 — Public Domain
Wellcome Collection

Lettering: Burning mirror. Burning mirror of Archimedes. Burning mirror with elevations. Burrough's machine for polishing glass. ; A Bell Prin.Wal.sculptor fecit

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