Herland (cylinder only), 1799, 1800

Cornish Mine Engines (3 items).

1294b. Herland (cylinder only). Jul., Oct. 1799, Feb. 1800. 3 items.
64 inch diameter cylinder with 9 foot stroke.

Sections and plans of the cylinder - partially shaded original and reverse drawings; sections and plans of the piston, lid and bottom - reverse drawing, with small reverse drawing of gland for the stuffing box attached. All the drawings bear letter codes.

Catalogue of Old Engines p. 304.

For Herland Mine. This cylinder was for an existing engine which had begun work in 1792. The engine was assembled from materials from a 63 inch engine, formerly Poldice Mine No. 3, which had worked at Chacewater Mine from Jul. 1787 to Apr. 1789. The original cylinder was re-sold to Poldice, and all the other materials went to Herland Mine, or Manor Mine as it appears to have also been called. Herland bought a new 64 inch cylinder, which made it the largest single-acting Boulton & Watt engine erected in Cornwall. On 6 Mar. 1799 Thomas Wilson reported that the cylinder had broken, and these drawings were duly made for its replacement. Henry Hazleton erroneously identified this as a complete new engine in the Catalogue of Old Engines.

See also: Portfolio 5/1323.