Technology: a door-closing mechanism. Engraving by J. B. Taylor after C. Varley.
Wellcome Collection

Technology: a door-closing mechanism. Engraving by J. B. Taylor after C. Varley.

http://data.europeana.eu/agent/158107

CC0 — Public Domain
Wellcome Collection

Lettering: Mr. J. Henlon's door spring. ; Drawn by C. Varley ; Engraved by J. B. Taylor

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