Identifier: worldscolumbiane02whit (find matches)
Title: The World's Columbian exposition, Chicago, 1893
Year: 1893 (1890s)
Authors: White, Trumbull, 1868-1941 Igleheart, William, (from old catalog) joint author
Subjects: World's Columbian Exposition (1893 : Chicago, Ill.)
Publisher: Philadelphia and St. Louis, P.W. Ziegler & co
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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DOUBI^B REKI< HOISTING ENGINE)—UNITED STATES SECTION. out the most solid quartz, lift it by the tons to the surface, crush itto powder, and by dozens of ingenious mechanical and chemicalprocesses separate the valuable metal ingredients. Here is a hugefurnace for the smelting and refining of bullion ; over there power-ful pumps and fans for ventilating and draining mines, while a17 258 MINKS. tunnel running beneath the building at the south end is an actualrepresentation of a mine gallery, and shows the method of timber-ing, lighting and underground haulage. This tunnel, by means of awire rope tramway, connects with the ore yard, from whence the
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MACHINERY EXHIBIT. ore used by the machines for demonstration purposes is conveyedto the space where it is to be utilized in the building. Perhaps the most striking display in the gallery is that of theStandard Oil Company, the entire north gallery being given up toits display of the crude and graded oils and manufactured by-prod-ucts, such as wax flowers; models illustrating the methods of drill-ing, for piping, storing and distributing the oils ; also geologicalmodels showing the relative position of the oil-bearing strata. Ina series of industrial courts running the entire length of the eastgallery are assembled mineral materials of the industries, separatedaccording to groups of the classification and along lines of affinity.From Group 48 to Group 42 one passes through a continual trans-formation scene ; the sulphurs, pigments and chemical salts at theone end giving place to the black pitches of the asphalt of Trini-dad, succeeded by exhibits of graphite in leads, crucibles and cl

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