Identifier: transactions12nort (find matches)
Title: Transactions
Year: 1852 (1850s)
Authors: North of England Institute of Mining and Mechanical Engineers, Newcastle-upon-Tyne North of England Institute of Mining and Mechanical Engineers, Newcastle-upon-Tyne. Report of the Committee upon mechanical coalcutting, 1905
Subjects: Mineral industries Mechanical engineering
Publisher: Newcastle-upon-Tyne
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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X Co/h.n i 1 121 SIXTH CASE.—ILLUSTKATED BY DRAWING No. 6. The plan No. 6 shows the general position of parts of the workingsin the Hutton seam of the same two collieries as are alluded to in thefifth case. They will here be distinguished as X and Y collieries, in thesame manner as in No. 5 case. The blue lines and arrows on the planshow the direction of ordinary intake currents, and the red lines andarrows those of the ordinary return currents. The red dotted arrowsshow the direction pursued by the reversed current of air under peculiarcircumstances, when a portion of the return air from the workings ofthe colliery X, passed into the colliery Y, from H to C, where it joinedthe principal intake air current of the latter colliery, and circulated withit through the very extensive workings of that colliery. Under ordinary circumstances a small split of air was allowed to leavethe intake current of the colliery Y, at the point C, near the downcastshaft, and to pass along a drift to the

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