File:The Civil engineer and architect's journal, scientific and railway gazette (1839) (14778728545).jpg

Identifier: civilengineerarc11lond (find matches)
Title: The Civil engineer and architect's journal, scientific and railway gazette
Year: 1839 (1830s)
Authors:
Subjects: Architecture Civil engineering Science
Publisher: London : (William Laxton)
Contributing Library: Northeastern University, Snell Library
Digitizing Sponsor: Northeastern University, Snell Library

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its apjiendages weighs 43 tons, «hich mass ofmatter is raised 11 feet high at each stroke of the engine. Thepump-work is supported by two iron girders weighing each 10 tons,and is strongly bolted down to a mass of masonry in the founda-tions. The boilers, four in number, are cylindrical, 34 feet long,6 ft. 6 in. diameter, with an internal fire-tube four feet indiameter. The diameter of the steam-pipe is 16 inches. The total weiglit of the engines, pump-work, and boilers is 414tons, and the whole cost was i210,000, or ii50per horse-power, orabout £24 per ton. The quantity of coal consumed by this engine, if working at fullpower night and day, would be 2,000 tons per annum, and thequantity of coals that would be consumed by the best of the ordi-nary mm-expansive engines in doing the same work would be 4,500tons; showing a saving in favour of the Cornish engine of 2,500 tons,which at 13*-. per ton is c£ 1,625 per annum, or 16j per cent, uponthe cost pf the engine for coals only. ~1^^
Text Appearing After Image:
ISIS.) THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. 10* COAL DROPS, AND MIDDLESBOROUGH DOCK. C With Engravings, Plate VI.J Account of the Drops used for the shipment of Coals at Middleshro-on-Tees, with a description of the Middlesbro Dock. By GeorgeTup.NBULL, M. Inst. C. E.—(From a paper read at the Institutionof Civil Engineers.) Tlie (lock was commenced in the spring of 1810, and was openedfor trade on the 12th May, 1812. The general form of the dockand its position with respect to the river Tets will best be under-stood by reference to the annexed engraving. It possesses an areaof 9 acres at the water surface ; the appr lach is by an entrancechannel, rather more than a quarter of a mile in length, cutthrough the sand banks of the river, and kept open by means ofoccasional sluicing from the lock-gates, and also through culvertsbuilt in the lock walls for that purpose. Some apprehensions wereentertained of the practicability of keeping open the entrancechannel by these means, as the

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