The Philosophical magazine; a journal of theoretical, experimental and applied physics . spark that results from the con-tact of the wire with the steel plate is accompanied by a depo-sition of a minute portion of the substance of the wire on thesteel; by using different wires, therefore, as of gold, silver,platina, &c., a variety of ornamental designs may probably beformed on polished steel surfaces. The effect of the electrical agency here described is nothowever confined to steel; a somewhat similar one may beobtained by substituting plates of other metals. By augment-ing the quantity and i
The Philosophical magazine; a journal of theoretical, experimental and applied physics . spark that results from the con-tact of the wire with the steel plate is accompanied by a depo-sition of a minute portion of the substance of the wire on thesteel; by using different wires, therefore, as of gold, silver,platina, &c., a variety of ornamental designs may probably beformed on polished steel surfaces. The effect of the electrical agency here described is nothowever confined to steel; a somewhat similar one may beobtained by substituting plates of other metals. By augment-ing the quantity and intensity of the electrical current, it seemsprobable that the efllect on the steel, or other metals, wouldbe proportionally increased ; and it may be anticipatetl that,by other modifications of the process, its applications may beadvantageously extended. I remain, Sir, yours respectfully, LJatI), July 5, 1843. JaMES HuRLY PrING, The accompanying sketch, in which the apjiaralus is re-|)rcbenteil lying ready lor use, niay jierhaps serve to illustratethe foregoing A, The stct;), or otiicr metallic plate to hv cfilicd upon. 1^. The etching point of platina wire proicttiii;; from the glacis handle. C. The coil of covered wire. U. The batteries. [ 108 ] XVII.—Soics of Propositions for rendering the Nomenclature ofZoology uniform and peimanent, being the Report of a Committeefor the consideration of the subject appointed by the British Asso-ciation for tJie Advancement of Science^. ALL persons who are conversant with the present state of Zoology must beaware of the great detriment which the science sustains from the vague-ness and uncertainty of its nomenclature. We do not here refer to those di-versities of language whicli arise from the various methods of classificationadopted by different authors, and which are unavoidable in the present stateof our knowledge. So long as naturalists differ in the views which they aredisposed to take of the natural affinities of
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