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.

  • Hall, Thomas
Date:
1861
Catalogue details

Licence: Public Domain Mark

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. 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.

    34/64 page 18
    Fig. 31. N'o. 31. Daniels's Protected Battery. The difference between this and Fig. 30 is, that the zinc cylinder is pro- tected by a porous cup. By this arrangement the battery is more constant, and will remain in action for several days, but is not so powerful. Price, $2.00. ]S^. 32. Large Size ditto. Price, $4.00. Fig. 33. No. 33. Smee's Constant Battery. This is composed of zinc and platinized silver, sulphuric acid and water, for solution. It is very constant, and will remain in action for
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