| Description | Cornish Mine Engines (9 items).
1325. United Mines, Poldory No. 2. Aug.-Oct. 1783. 9 items.
Single-acting engine, with 48 inch cylinder, 9 foot stroke, chain connection.
General view of the engine - reverse drawing; inside front view of the engine and longitudinal section of the boiler - reverse drawing, with a second copy with a cross-section of the boiler added and some differences in detail, i.e. chimney construction, some of the dimensions; plan of the engine and boiler - reverse drawing; section of nozzles, steam pipe - reverse drawings; clack door and blast hole pieces - 2 copies, 1 marked "Reverse copy sent to Bersham" and the other marked "Reverse copy sent to Coalbrookdale"; eduction pipe - reverse drawing.
Original Portfolio or 'Book' No. 38. Catalogue of Old Engines p. 300.
For United Mines. Poldory Mine was part of the United Mines. The drawings, the Engine Book, the first section of the List of Engines made at Soho, John Southern's List of Books and the portfolio cover describe this engine as having a 48 inch cylinder and a 9 foot stroke. However the geographical section of the List of Engines made at Soho, the Catalogue of Old Engines and Dickinson & Jenkins [p. 342] all describe it as having a 45 inch cylinder and an 8 foot stroke. The List of Engines made at Soho calls it the "Poldory New" engine and notes it as still being at work in May 1798. Dickinson & Jenkins call the "New Poldory (Cupboard)" engine.
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