The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . enteredthe emplov of Mr. Howard in the Waltham factory, and there his inven-tive genius was brought into full piay in originat-ing new tools and machines to do the workformerly done by hand. He not only conceivednew ideas, but being an excellent draftsman, heplaced them on paper and then entering themachine shop he put these machines his charge the jeweling department of thefactory made a complete revolution over the oldmethods, and new methods and systems of doing^ — work
The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . enteredthe emplov of Mr. Howard in the Waltham factory, and there his inven-tive genius was brought into full piay in originat-ing new tools and machines to do the workformerly done by hand. He not only conceivednew ideas, but being an excellent draftsman, heplaced them on paper and then entering themachine shop he put these machines his charge the jeweling department of thefactory made a complete revolution over the oldmethods, and new methods and systems of doing^ — work were introduced and the product doubled. ervoo . Many of the machines and tools used to-day in watch factories were invented and first built by him. Among hismany inventions were the counter-sinker or screw-head tool, for jewelscrews; the end-shake tools, the opener, and the truing-up tools. In1864 he interested capitalists and organized the Newark Watch Com-pany. He died in October, 1872. SIDEREAL CLOCK. A clock adjusted to measure sidereal usually numbers the hours from o to 24. See Sidereal Day. 294 SIDEREAL DAY. The interval of time between two successivetransits over the same meridian of the vernal equinox, or first point ofAries. It is the true period of the earths rotation. See Time. SILVER. A soft, white, precious metal, very malleable and ductileand capable of taking a high polish. For Silver Plating, see Separating Silver. The silver-holding alloy or metal is dissolved inthe least possible quantity of crude nictric acid. The solution is mixedwith a srtong excess of ammonia and filtered into a high cylinder, pro-vided with a stopper. A bright strip of copper, long enough to projectbeyond the liquid, is next introduced, which quickly causes separation ofpure metallic silver. The reduction is completed in a short time, andthe reduced silver washed first with some ammoniacal solution and thenwdth distilled water. The more ammoniacal and
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Keywords: ., bookcentury1800, bookdecade1890, bookidamericanwatc, bookyear1892
