| Description | 60a. Oscillating Engines - Steam Boat Elizabeth (VK & VL). Mar.-May, Aug. 1863. 30 items.
Two 15 horse power oscillating engines, with 24 inch cylinders, 2 foot strokes.
Sections and plans of the boat - coloured drawings on cloth; section of the boat at and under the engines, sections and plan of the engine room - 2 partially coloured tracings of drawings by Lewis & Stockwell.
Cylinder etc. - coloured drawing; position of columns - tracing; paddle wheel - coloured drawing and tracing; sections of the boiler - 2 partially coloured original and 1 partially coloured reverse drawing; upper headstock - 2 coloured drawings; midship section showing the engines, elevation and plan of the engines and boilers - coloured drawings; plan of the deck and steam pipes - 2 coloured drawings; cross-section at the boiler - 2 coloured drawings. These drawings were made in the London office and several bear letter codes.
Rough drawings made at Soho, miscellaneous tracings:
Air pump connecting rod cap, (partially coloured drawing), slide valve rod, starting bracket, working gear, eccentric auxiliaries, crank shaft, feed and bilge pump gear, working gear blocks - drawings made at Soho (several of these were initially made for the 10 horse engines for the steam boat Indus); guard rail in front of the slide valve - partially coloured tracing; sketch plan of deck and steam pipes - small tracing; plating on the boat frame - small tracing; "Specification of a Pair of oscillating marine condensing engines of 30 horses power - with paddle wheels complete" - press copy (2 sheets).
For the steam boat Elizabeth. The Elizabeth was built by Lewis & Stockwell, who initially referred to her as "A35". She worked round the coast of Wales.
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