Golconda
the name of an ancient kingdom of India and its abandoned metropolis. It lay midway between Bombay and Madras. Golconda was an important center of the diamond cutting industry, and was consequently famous for these gems. It is a mistake to speak of the mines of Golconda, however, as the precious stones were brought to that city usually from some distance. The ruins of the old city are still remarkable for a vast number of mausoleums of its former sovereigns,--dome-crowned structures of gray stone, each with its own mosque and terraces. See Diamond ; Gem
Only in Aiton's Encyclopedia
Gold Alloy
An imitation resembling the pure metal in color and of about the same specific gravity is made by melting together in a crucible, well covered with charcoal-dust, copper 7, platinum 16, zinc 1. Mannheim gold, another beautiful imitation, is made in the same way from copper 16, zinc 4, tin 1. Gold 75, copper 25, and a little silver is a remarkable jewelry composition.
Only in The Encyclopedia of Founding
Gold Amalgam
a mineral comof mercury, 57.40; gold, 38.39; and , 5. It is found in Colombia in grains about the size of a pea, and California in yellowish - white, fourprisms.
Only in Collier's New Encyclopedia
Gold and Silver Colored Cement
For filling hollow gold and silver articles. Consists of 60 parts shellac, 10 parts Venetian turpentine, and 3 parts gold bronze or silver bronze, as the case may be. The shellac is melted first, the turpentine is then added, and finally, with constant stirring the gold or silver bronze.
Only in American Watchmaker and Jeweler
Gold Coast Colony
a British crown colony on the coast of west Africa. Coast line about 350 miles; area about 80,000 square miles; pop. about 1,604,000, of whom about 500 are Europeans. The native state of Ashanti lies inland, at the back of the central portion of the colony and is now included in British Gold Coast Territories. The products are chiefly palm oil, gold, palm kernels, rubber, timber, etc. Chief town, Accra. Trouble arose between the King of Kumassi, who had declared himself King of Ashanti in 1894, and the British authorities and in 1895 an expedition was sent against him, under the command of Sir Francis Scott, which resulted in the submission of the king, who was afterward taken to the coast. The kings of Bekwai and Abodom also made their submission, and the country was placed unapder British protection, and a resident pointed at Kumassi. The Niger Convention drawn up by the Anglo-French Commission sitting at Paris, and signed June 15, 1898, settled the boundaries of the hinterland to the W. and the N. Bona and Dokta were given up to France, and the French had to concede Wa and other points to the E. of the Volta which had been occupied by them. Mill
Only in Collier's New Encyclopedia
Gold Furnace
a furnace for melting or reducing gold. It resembles a brass furnace, but is usually built above the floor, occupying one side or more of the shop, and appearing like a dwarf wall. The aperture for the fuel and crucible in each furnace is 9 to 16 inches square, and 11 to 20 inches deep. The crucibles are usually of black lead.
Only in Collier's New Encyclopedia
Gold Hill
a former village of Nevada, 7,000 feet above the sea, and about a mile S. of Virginia City, to which it has been annexed. It has rich silver mines, and several quartz mills. Here, on Mount Davidson, is the famous Comstock lode.
Only in Collier's New Encyclopedia
Gold of Pleasure
a small genus of Cruciferæ. The common gold of pleasure (C. sativa) is an annual plant of humble appearance, but with abundant yellow flowers. It is most commonly known as a weed in lint fields, though it is also cultivated alone or mixed with rapeseed in parts of Germany, Belgium, and the S. of Europe for sake of the abundant oil contained in its seeds. Its seeds and oil cake are, however, inferior to those of lint, and its oil is apt to become rancid and is less valued than that of rape or colza. The crop is cut or pulled when the pouches begin to turn yellow. The stems are tough, fibrous, and durable, and are used thatching and for making brooms; their fiber is sometimes made into very coarse cloth and packing-paper. The seeds are used for emollient pou poultices. C. dentata is of similar habit and properties, but is not cultivated.
Only in Collier's New Encyclopedia
Gold Polishing Powder
Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
In addition, this page directs the use of hazardous substances — such as benzine, gasoline, lye, or strong acids — for household tasks. These materials are highly flammable, corrosive, or poisonous, and the practices described have caused fires, burns, and poisonings.
This information has been left in for historical purposes but should not be acted upon.
Mix together 4.3 parts of alumina, 17.4 of chalk, 4.3 of carbonate of lead, 1.7 of carbonate of magnesia, and 1.7 of rouge. Polishing Paste for Brass. Dissolve 15 parts of oxalic acid in 120 parts of boiling water and add 500 parts of pumice powder, 7 of oil of turpentine, 60 of soft soap, and 65 of fat oil. The polishing agent is usually mixed with oil, alcohol or water to prevent scattering, and is then applied by the polishing tool in the shape of cloth and leather buffs, polishing files, etc. Either the work or the tool should revolve with great velocity in order to secure good results. Many articles are brought to a high degree of polish by the use of the burnisher, after subjecting them to the action of the ordinary polishing agents. See Burnisher, also Buff.
Only in American Watchmaker and Jeweler
Gold Solders
Gold solders should approach the articles to be soldered in both color and fusibility as nearly as possible. The following gold solders are in general use:
Only in American Watchmaker and Jeweler
Gold Spring
A very thin spring made of gold, attached to the detent of a chronometer escapement. See Chronometer Escapement. GRAHAM, GEORGE. Born in Cumberland, England, in 1673 and died in 1751. He was buried in Westminister Abbey. He was the inventor of the mercurial pendulum (1715), the dead beat escapement for clocks, and is credited with being the inventor of the cylinder escapement.
Only in American Watchmaker and Jeweler
Gold Tooling
in bookbinding, ornaments impressed by the hot tool on goldleaf laid on book-covers, causing the metal to adhere. In contradistinction to blind tooling, which is the tool mark without the leaf.
Only in Collier's New Encyclopedia
Gold-solder
Take gold of the same quality as the article to be soldered, and add 1/12 of silver and 1/24 of copper. A larger proportion of silver and copper may be added for articles not so fine. See SOLDERS. Gong-metal is composed of copper 78 to 80, tin 20 to 22. After casting, the metal is subjected to a process of hammering and annealing. Owing to the brittleness of the mixture, great care and judgment is required to beat it into the flat basin-shaped gong, which, when struck with the mallet, puts the metal into such an extraordinary state of vibration as to produce the piercing sound emitted. Annealing is obtained by heating to a dull red, and suddenly immersing in water. When cold, the hammering can be continued until a point of brittleness is reached, when a repetition of the annealing process is made necessary, and so on until completed. See ALLOYS; BRASS.
Only in The Encyclopedia of Founding