| Description | Pumping and Canal Engines. (13 items).
Single-acting engine, with 48 inch cylinder, 8 foot stroke, parallel motion, cast iron beam.
Reverse plan of the engine house and boilers and pump, plan of the tunnel, longitudinal section of the engine house and pump, section of the lower part of the pump well, section of the engine house and boilers, longitudinal section of boiler; pump, clack and bucket - original and partially coloured reverse drawings (part of the original has been cut away; list of pump parts with sketch of pump attached; clack seat and suction pipe; pump rod joints marked "Copied from drawing of Braunston engine 10 Jan. 1818"; sketch section of pump with extensive notes; ground plan of the reservoir, canal and Windsor Arm, present engine, tunnel etc., "traced from a plan in the possession of Mr. Thompson & Mr. Andrews, 4 Jun. 1817" with small plan of new engine house stuck on; section of existing pump pit, and section of the reservoirs and tunnels "traced from a drawing in the possession of Mr. Thompson & Mr. Andrews, 4 Jun. 1817"; letter from Boulton Watt & Co. (in James Watt Jr.'s hand) to William Murdock in London, 9 Jun. 1817, with sketch of pump and tunnel. The reverse drawings bear letter codes.
Original Portfolio or 'Book' No. 700. Catalogue of Old Engines p. 138.
For the Grand Junction Canal. Tring Summit, Hertfordshire.
See also: 4/95 (Engine Order Book No. 9).
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