| Description | Vacuum and Blowing Engines (17 items).
Double-acting engine, with 40 inch cylinder, 8 foot stroke, parallel motion, cast iron beam.
Coloured original and reverse general view and plan of the engine and boiler and blowing and regulating vessels, front view of the engine; reverse plans and sections of the engine house and boilers, drawings of the cistern (copies made Aug. & Sep. 1827); sections of the beam, plans and sections of the blowing cylinder and pipes (3 different sheets of drawings) - reverse drawings; parallel motion - coloured original and reverse drawings; working gear - coloured original front and side views; uncoded and undated coloured original general of the engine and boiler and blowing and regulating vessels. All the drawings except the last item bear letter codes.
Original Portfolio or 'Book' No. 382. Catalogue of Old Engines p. 270.
For Thomas Hill & Co. Blaenavon Iron Works, Monmouthshire.
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