A manual of practical medical electricity / by Dawson Turner.

Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: A manual of practical medical electricity / by Dawson Turner. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    trough, and are smeared over with a paste of sulphate of mercury ; the zincs form lids which lie over them. In Schanschieff’s cell there are two carbons to each zinc, and a strong solution of the basic sulphate is the excitant. In some of the later forms of sulphate of mercury batteries, there is an arrangement for raising or lowering the elements out of or into the solution, according to the strength of current required, and, to insure portability, the 2. Fig. 21.—Arrangement of Zinc and Carbon. vessels are provided with floating ebonite pieces to prevent spilling of the acid solution (Figs. 20 and 21). Gaiflfe also sells the excitant in the form of a salt, which has only to be dissolved in water. The small cells of Gaiffe are suitable for working in- duction coils, the larger cells for galvanization and other purposes. This battery has found much favour in France ; it is asserted that it is very constant, that it gives off no fumes, that the zincs are kept constantly amalgamated by the mercury which is precipitated in the cell during action.