Coloured drawing (34" x 26") of the Cornish Beam Pumping Engine

Coloured drawing (34" x 26") of the Cornish Beam Pumping Engine, made in 1863, which finally worked at Carpalla, St. Austell; comprising 3 sectional elevations and 2 sectional plans, scales 1/4" and 3/4" to 1 foot. Also schematic diagram (34" x 21") of above