Public Domain Mark
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Credit
Illustrated catalogue of electro-medical instruments : manufactured and sold by Thomas Hall, (successor to Palmer & Hall,) electrician, manufacturer and importer of magnetic galvanic, and telegraphic instruments. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.