of, 302, 303 uses of, 563 cold, bisulphite of sodium for. 28. 282 with paste, 272-275 compositions of paste for, 272, 274, different processes of, 275 concluding remarks, 352-5 leaf, 267, 268 liquid, 275 old, 340, 341 small articles, 275 various formulæ for immersion without previous coating with copper, 293 Similor, 556 Simplified galvanoplastic apparatus, 432-435 Siphon, 607, 608 Smee, early reference to electro-deposi- on the electro-deposition of cal- Smee's battery, 87-90 constitution and electromotive Roseleur's modification of, 88- 90 simplicity of, construction of, Sodium, bibasic phosphate of, 55, 386 bicarbonate of, 568 bisulphite of, preparation of, for silver, 280-282 phosphate of, 584, 585 pyrophosphate of, 585, 586 sulphite and bisulphite of, 591, 592 varnish to prevent tarnishing, 616, Solution, electrotyping, 488 617 Silvering, 264 antique, 340, 341 Solutions old, recovery of gold from, 410-412 bath, adapted for set jewelry, Spencer's solution for the galvanic de- Statuary brass, 556 Steam power, small amount required to wax, and marine glue, moulding Stearined objects, metallization of, 457 brassing bath for, 138 cleansing, 66, 67 for plating, 295 color and lustre of, on brass, with gilding and silvering, without a wire, depositing copper on, 620 Stereotyping, 495, 496 Stockley, G. W., 106, 107 varnishes, 227, 228, 236, 237, Striking solution of the Meriden Bri- tannia Co., 297 silver, of the Wm. Rogers Sulphate of copper, 125, 588, 589 Sulphate- (of protoxide) of iron, 589, 590 Sulphate of zinc, 590 accumulation of, in the bat- characteristics and uses of, Sulphide of ammonium, 592 Sulphite of ammonium, characteristics, characteristics, and prepara- Sulphuretted hydrogen, 551, 552 Sulphuric acid, 553 Surfaces, ornamenting plated, 340-348 automatic for regulating the cur- or governor of the Weston machine, Synonymy, chemical, 535–539 Tank for solutions of tin, 158, 159 for copper baths, 120-122 preparation of, 554 Tannin, 554 Tarnishing of silver and silver-plate, Temperature of the zinc bath for gal- vanizing, 527 Terchloride of gold, 578-575 Terne plates, 519 Testing the working condition of a bat- tery before using 80, 8. characteristics and uses of, Tetra-chloride of platinum, 575-577 588 cheap to be avoided, 589 solution, decomposition of, the best preparation of, 589 | Thermometer, 608 Thick metallic deposits, 423 Thompson, J. B., claims for depositing Time required for laying coat of silver, thin coating copper and brass with, Undercut patterns, 496, 497 152 Ungilding solutions spent, utilization United States, large imports of tin Unwin, Mr.. process of preparing the Urquhart on the bright silvering pro- on the proportions of gold in gild- Urquhart's experiments with Bertrand's formulæ for simple immersion sil- vering, 284, 285 process of tinning, 163 Useful notes and comments, 611-614 Van der Weyde, comparison between the Varnish, coating substances to be me- colored, 60 gold, 58-61 green gold, 60 orange-yellow and gold, 60 to remove from articles, 61 Varnishes, composition of, 61 different shades of, 60 stopping-off, 227, 228, 236, 237, Winckler, Emil, procedure for electro- | Zinc, amalgamating, 64 brassing zinc, copper, iron, and Winckler's cold electro-zincing bath, 396 electro-tinning bath, 157 Wine vinegar, 541 Wire cloth galvanizing, 529 iron, or zinc, in coils, brassing, old process of gilding, 230, 231 Wiring in electrotyping, 485 Wm. Rogers Manufacturing Cor, amount Wood, vinegar, 541 of silver deposited on tableware by, 303 bright silvering, practice of deposit- Wooden depositing vats, 436, 437 Wright, John, early experiments of, in pickle for cleansing, 66 Yellow ormolu, 609 prussiate of potassium, 581, 582 and iron, alloy of, forming in the galvanizing bath, 529 articles, brassing, 146 coppering, 146 free from oxide before tinning, bath for galvanizing, temperature brassing bath for, 138 coating iron with, 526 dead gilding, 244-251 on, removing, 63, 64 deposition of, 395-498 electro-, 395-397 excellent protection for iron when 62 lead, tin, and iron, unsatisfactory rebrassing and recoppering, 64 sulphate of, 590 of accumulation of, in the bat the metals with which it is com by simple immersion, 151, 152 wares, tinning by simple immer Zincing by contact with another metal. 897, 398 Zincs in batteries, removing, 84 THE END. |