 Class 373. Machines and apparatus for cutting, turning, and polishing marble, granite, and other stone. (See Group 78.) GROUP 59. PLACER, HYDRAULIC, AND "DRIFT" MINING. Class 374. Apparatus and machines for washing gravel; sluices, cradles, toms, rockers,...  Catalogue of the Exhibits of the State of Pennsylvania and of Pennsylvanians ... - Page 52by Pennsylvania. Board of World's Fair Managers - 1893 - 218 pagesFull view - About this book
 | World's Columbian Commission - Chicago (Ill.) - 1891 - 134 pages
...GOLD AND SILVER BY LIXIVIATION. Class 364. Roasting and chloridizing furnaces. Class 365. Chlorination process and adjuncts. Class 366. Other processes....and machines for washing gravel; sluices, cradles, tqms, rockers, rifles, etc. Class 375. Construction of ditches, flumes, pen-stocks, etc. Class 376.... | |
 | United States. World's Columbian Commission - Chicago (Ill.) - 1891 - 134 pages
...WORKING STONE. Class 370. Quarrying, channeling, and cutting engines. Class 371. Derricks and fittings. Class 373. Machines and apparatus for cutting, turning,...APPLIANCES OF UNDERGROUND MINING, TIMBERING AND SUPPORTING. Class 378. Timber cutting and framing machines. Class 379. Methods of timbering shown by examples.... | |
 | 1891 - 554 pages
...WORKING STONE. Class 370. Quarrying, channeling, and cutting engines. Class 371. Derricks and fittings. Class 373. Machines and apparatus for cutting, turning,...Apparatus and machines for washing gravel; sluices, cradbs, toms, rockers, riffles, etc. Class 375. Construction of dkches, flumes, pen-stocks, etc. Class... | |
 | World's Columbian Exposition - 1893 - 1252 pages
...appliances. Class 3(58: Lead bullion molds and bars. Class 369. Refining operations. GROUP 58. QUABRYING AND WORKING STONE. Class 370. Quarrying, channeling,...rifles, etc. Class 375. Construction of ditches, flumes, pen stocks, etc. Class 376. Pipes for conveying water. Class 377. "Giants," nozzles, and appurtenances.... | |
 | New South Wales. Commissioners for the World's Columbian exposition - Metallurgy - 1893 - 170 pages
...plant and appliances. Class 368. — Lead bullion moulds and bars. Class 369. — Kefming operatiooe. Group 58. — Quarrying and Working Stone. Class 370....washing gravel; sluices, cradles, toms, rockers, rifles, &c. Class 375. — Construction of ditches, flumes, pen-stocks, &c. Class 370. — Pipes for conveying... | |
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