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Image from web page 507 of “Knight’s American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary and digest of mechanical appliances in science and the ar
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Title: Knight’s American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, basic technological vocabulary and digest of mechanical appliances in science and the arts
Year: 1882 (1880s)
Authors: Knight, Edward H. (Edward Henry), 1824-1883
Subjects: Industrial arts Mechanical engineering
Publisher: Boston : Houghton, Mifflin and Business
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Text Appearing Just before Image:
e time of Pliny. The mines of Idria,the Palatinate, and of New Almaden in California,are extensive and wealthy. The ore is also identified inPeru, China, Hungary, Sweden, Jajiaii, and Chili. In the furnace the ore is subjected to distillationiu retorts which lead to condensing-chambers, or theblocks of ore are roasted in a furnace, the entire vol-atile final results of the furnace passing with the metal-liferous fumes to a series of condensing-chambers.See CoNDENSKi. See prior post. The latter is the ]ilan adopted at Idria in Austria,the former in Bavaria and California. Dr. Uresretort-furnace, elected at Landsberg in Bavaiia,resembles the apparatus for the distillation of coal-gas. In Spain, the old Buytrone or Aludel furnace isstill adhereil to. See Aludel. Mercu-ry-gather-er. (Metallurgy.) A stir-ring apparatus in which fluurcd quicksilver, whichhas been rendered what is technically known as *ict,is gathered together. See Amalgam. Mercury which is floured is in a sort of powdery Fig. 3124.
Text Appearing Right after Image:
Quicksilver- Gatherer. condition, the particles being coated with sulphurfrom the pyrites or from other cause and the object mp:ridiax. 1421 METAL. of the mechanical agitation and rubbing, in the mer-cury-gatherer, is to cause the globules of mercury tocoalesce ami resume the fluid condition. Me-ridi-an. A gieat circle supposed to passthrougli bntli ))oles, and the zenith and nadir of agiven location. Me-ridi-an-oircle. 1. A transit instrumentwitli a graduated circle securely fastened at rightangliS to the horizontal a.xis and turning with it. The meridian circle in the National Observatoryof Washington was maile by Ertel and Son, ofMunich. Its object-glass has an aperture of 4^inches, with a focal distance of 58 inches. This in-strument is provided with a circle 30 inches indiameter, <Uvided into arcs of three, and reads by fourmicrometers to single seconds. two. The altitude circle of a globe. Me-rino. (Fabric.) A fine, French, woolengooils, so named as getting created of the wool of themeri
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