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ch have been employed have been much modified by the experience in boring the oil-wells of the petroleum region. A great impetus was given to the exercise of ingenuity in this line by the exigencies of this branch of industry; the inventions including boringtools, toolgrabs, tool-jars, derricks, rodcouplings, reamers, welltubes and couplings, tube — packing, seed-bags, ejectors, and engines specifically adapted to sinking the shaft and raising the oil. The boring of the artesian well at Belcher's Sugar Refinery, St. Louis, was effected by a simple wedgeshaped drill, the size of which varied according to the diameter of the bore; this drill was screwed to a wrought-iron bar 30 feet long and about 2 1/2 inches diameter, weighing several hundred pounds. To the bar was screwed a pair of slips, so that the drilling was effected by the weight of the bar alone. To this were fastened the poles, each of which was 30 feet long. These were screwed together, and were made of two pieces of
1. (d.) Stationary Shuttles. 12,015RobertsonNov. 28, 1854. 17,366EllithorpeMay 26, 1857. 19,662ParkerMar. 16, 1858. 1. (d.) Stationary Shuttles. (continued). No.Name.Date. 20,699ComfortJune 29, 1858. 27,279DoppFeb. 28, 1860. 34,988SmithApr. 15, 1862. 56,020DulaneyJuly 3, 1866. 62,986WillsonMar. 19, 1867. 105,631BletcherJuly 26, 1870. 2. By revolving Hooks. (a.) Wheeler & Wilson Pattern. 8,296WilsonAug. 12, 1851. 9,041WilsonJune 15, 1852. 10,878CrosbyMay 9, 1854. 16,710BelcherMar. 3, 1857. 22,961MarchFeb. 15, 1859. 24,455GoodwynJune 21, 1859. 24,881MortonJuly 26, 1859. 24,937HaydenAug. 2, 1859. 25,043PrattAug. 9, 1859. 25,059TapleyAug. 9, 1859. 25,223StoddardAug. 23, 1859. 26,948JohnsonJan. 24, 1860. (Reissue.)913WilsonFeb. 28, 1860. (Reissue.)914WilsonFeb. 28, 1860. 30,615CollinsNov. 13, 1860. 33,341FolgerSept. 24, 1861. 36,591WilkinsSept. 30, 1862. 38,076WilkinsMar. 31, 1863. 40,000Tracy et al.Sept. 15, 1863. 40,589SecorNov. 10, 1863. 4