AGRM'l'f/riJRAL ENGINES. 65 



quently ^een by the writer prior to its removal to make 

 room for a more powerful engine. 



What greater proof could be given of the fitness of 

 design of this early engine, than its long life of forty 

 years under such rough treatment, and the facility with 

 which it was applied to different uses. Mr. Bickle, 

 who, from recollection, had made a sketch of this engine 

 before the writer had found Trevithick's sketch, says that 

 after the engine had ceased to work, the boiler was turned 

 to account in heating tar in the ship-builder's yard. 



Si In 1854 I saw working in a shed at Carnsew, in the ship- 

 building yard of Harvey and Co., of Hayle, an engine working 

 a stamps for pounding up the slag and furnace bottoms from 

 the brass-casting foundry. 



" I was then the foreman hammerman in Harvey and Co.'s 

 smiths' shop and hammer-mill, and frequently noticed this old 

 engine and inquired about it. It had been brought from Lord 

 Dedunstanville's, at Tehidy Park, where it at one time worked 

 a thrashing machine. The boiler was of wrought iron, built in 

 brickwork, and looked like a big kitchen-boiler. A flattish 

 cover was bolted on to the top of the boiler, and the cylinder 

 was let down into this top. 



"The cylinder had no cover; it was about 8 or 10 inches 

 in diameter and 2 or 3 feet stroke. The piston was a very 

 deep one, with a joint for the connecting rod which went 

 direct to the crank, which was supported on two upright stands 

 from the cover on the boiler. The fly-wheel had a balance - 

 weight for the down-stroke. A pitch-chain for driving passed 

 over the wheel, which had pins in it, or projections, to catch into 

 the square links of the driving chain; it was worked by a 

 four-way cock." l 



"About 1843, when we were building iron boats for the 

 Khine, the old engine was put to work to drive the tools or 

 machinery in the yard. She was very useful to us and worked 

 very well. She worked about ten years, and was then thrown 



1 Recollections of Banfield, foreman with Harvey and Co., Penzance, 1869. 

 VOL. II. 1'' 



