Jewelers' Cement
Put in a bottle 2 ounces of isinglass and 1 ounce of the best gum Arabic, cover them with proof spirits, cork loosely and place the bottle in a vessel of water, and boil it until a thorough solution is effected; then strain for use.
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Jeweling
The act of fitting in jewels for pivots to run in, to diminish wear of the acting parts. Sapphires and rubies are used in the better class of work, while in cheaper watches garnets are substituted. In escapement holes, where endstones are used, as in Fig. 181, the jewel in a loose setting is fitted into a recessed hole, and upon it the end-stone, also set in metal, is laid, and the whole secured by two small screws. In cheaper movements the jewel is rubbed in, as shown in Fig. 180. (For full directions in regard to making and setting jewels the reader is referred to Watch and Chronometer Jeweling, published by Geo. K. Hazlitt & Co., Chicago.)
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Jeweling Chuck
The Hutchinson Jeweling Chuck, which is shown in Fig. 77, is intended as a substitute of wax, when manipulating jewels. The cut represents a full size chuck, which is made similar to the ordinary split chuck, but has an adjustable center which can be moved backward or forward by means of the screw in the rear, and is used to support the jewel while in place in the chuck. They are made in three sizes. Another form of jeweling chuck is shown in Fig. 78, and is known as the Deuss Chuck. It is a self-Centering chuck which will hold all sizes of jewels and fits the wheel or step chuck of all American lathes.
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Jeweling Tool
Fig. 182 illustrates Hutchinson's Automatic Jeweling Tool. To cut a setting for a jewel, place tool in tail-stock and taper in head of lathe, and see that corner of cutter E comes to center. If it does not, turn screw D back or forward until it comes to the center. Now drill hole half as large as the jewel you wish to set; then place jewel in slot A, and bring index finger over until jewel is tight in slot A, being careful to have jewel in center of slot and not to one side. Now turn set screw C up tight and tool will cut setting exact size.
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Jewelry
a articles intended for personal decoration, made of precious metals, which may enamels. be enriched with stones or Popularly, there is much confusion between the terms gem and jewel; the former belongs especially to engraved stones. Before the use of metals was known, jewelry, if it can be so termed, consisted of carved beads and fragments of such bright substances as were at the command of prehistoric man. Gold is the first metal of which there is any mention in literature, and there is no doubt that, being always found native, it was the first to be used by mankind. Among the numerous finds of gold jewelry of prehistoric times there are many specimens which show that the early artificers possessed considerable command over their material in the way of hammering out plates to uniform thickness, drawing or beating the metal into wire, and plaiting and twisting it into torques, armillæ, rings, and other forms of ornament. In these earliest gold ornaments there is no attempt at decorative treatment other than that what could be produced by the hammer; and it is only by degrees that simple efforts at chasing, engraving, and embossing make their appearance. The distinction between jewelry of the present day and that of earlier times is found in the fundamental fact that the old work is the creation of the craftsman, while the modern jewel is the product of a manufacturer who adopts all labor-saving machines and appliances for the economical finishing of his wares.
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Jewett, Sarah Orne
Sarah Orne (1849-), an American novelist and writer of short stories. She was born in South Berwick, Maine, and began contributing to the Atlantic Monthly when about twenty years of age. Among her books may be mentioned: Deephaven, Country Byways, A Marsh Island, A Country Doctor, Betty Leicester, The Story of the Normans, The Life of Nancy, Betty Leicester's Christmas, and The Country of the Pointed Firs. Her stories are delicately drawn pictures of New England . "Her books are alive with the fragrance of the woods, the murmur of pines, the lilt of the ebbing tide in the lush sea grass, and the simple occupations of homely country folk."
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Jewish Literature
. See Literature
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Jezirah
one of the two principal works of the Kabbala, its date being assigned by some to the 1st, by others to the 8th or 9th century.
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Jezreel
a city of Issachar (Josh. : 18), W. of Bethshean. Jezxix in the time reel was called Esdraela of the Maccabees, and is now replaced by a small and ruinous Arab village called Zerin, at the N. W. point of Mount Gilboa. Also the name of the great plain lying between Jezreel and Acre.
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Jhelum
or JEHLAM (jel'um), also called the Bitasta (whence the ancient Hydaspes), one of the rivers of the Punjab. It rises in the mountains of Kashmir, which country forms its upper basin, and is navigable for about 70 out State. On the of 130 miles within that banks of this river was fought the battle Porus. between Alexander the Great and
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Jib
a large triangular sail set on a stay, forward of the fore stay-sail, between the fore-top mast-head and jibboom in large vessels. It occupies a position between the mast-head and bowsprit in cutters, schooners, and small craft, and does not necessari necessarily run on a names stay. Jibs are known by various , according to position, etc., as inner-jib, Bled 19 outer-jib, standing-jib, flying-jib, spindlejibjib, storm-jib, jib-of-jibs, etc. A topsail or balloon-jib extends toward the topmast head, and in cutter yachts is sometimes a very large sail. Also, the extended arm of a crane; or that spar botof a derrick which is stepped at the tom and connected by tackle at the top to the vertical post.
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