lv 
An engine of eighty inches cylinder, erected by Richards, at 
Wheal Vor,* now took the lead ; by lifting, 
In 1832—91:4 millions per bushel ot or 108°9 millions per cwt. of coal, and 
», 1833—85:3 __,, Fy ei Bhvgg LONG 2 
In 1834,§ West erected, at the Fowey Consolidated Mines, an 
engine of the same dimensions, in which he embodied all previous 
improvements,—modifying them by the results of his experience 
during several years as an assistant to Grose,—at Wheal Towan. 
During 
this year it realized a duty of 97:8 millions|] per bushel, or 116-5 per cwt. 
and in 1835 ‘ Bea Oy eu7, ayo AM PA » 114: 30 
In 1836, however, an engine of similar dimensions set up by 
Eustis at Wheal Darlington attained the first place; having per- 
formed 95-4 millions** per bushel, or 113-7 per cwt. of coal. In 
1837+} the engine at the Fowey Consolidated Mines regained its 
* The dimensions of this engine, and a diagram taken by an J/ndicator 
placed on it, are given by Henwood. Trans: Inst: Civil Engineers, ii., pp. 
54-55, Pl. iv., Fig. 11. 
f Lean, Historical Statement, p. 95. 
+ Ibid, p. 96. 
§ In 1834 a detailed description of a Cornish Pumping-Engine in its 
present form was first published by Combes; with illustrations by Hocking, 
who had designed it for the Consolidated Mines. Annales des Mines, 3me 
Série, v., pp. 367- 370, 593-608, 616-621, Pl. xi., Fig. 1-7. 
|| It has been represented that during a trial, superintended by the 
Pursers, other Accountants, Captains, and Pitmen of various mines, this 
engine performed a duty of 125-1 millions per bushel, or 142°5 per ewt. of 
coal. A single bushel of the coal they used was found to weigh 94 lbs. 
Luan, Historical Statement, pp. 97-101. Parkes, Trans: Inst: of Civil Engi- 
neers, ill., pp. 62-63. Pour, Cornish Pumping Engine, pp. 66, 67. Smyth, 
~ Coal and Coal-Mining, p. 187. 
Tt has been inaccurately stated that this duty was maintained during an 
entire month. Brarpmore, Proceedings of the Inst: of Civil Engineers, Xxiii., 
p. 83. 
The dimensions of this engine, and various details relating to it, have 
been published by Wicksteed. Haxperimental enquiry concerning the Cornish 
and Boulton and Watt Pumping Engines, p. 25. Combes, L’Hxploitation des 
Mines, iii., pp. 677-678. 
- @ Lean, Historical Statement, p. 113. 
**® Tbid, p. 133. 
At Loam’s engine on the United Mines during the same year 195,646 
cubic feet of water were converted into steam by the combustion of 11,916 
bushels, being at the rate of 16-4 cubic feet per bushel, or 19°5 per ewt. of 
coal. Lean, Reports of the Royal Cornwall Polytechnic Society, iv., p. 34. 
++ Lean, Historical Statement, p. 134. 
At this time an engine, of fifty inches cylinder, at Holmbush near 
Callington was reported to have raised 102°7 million lbs. one foot by the 
consumption of a single bushel,—which weighed 94 Ibs.—or at the rate of 
122-4 millions per ewt., of coal. Wuicxstrsp, Trans: of the Inst: of Civil 
Engineers, ii., pp. 61-64; Haperimental enquiry concerning the Cornish and 
Boulton and Watt Pumping Engines, p. 26. Combes, L’EHxploitation des 
Mines, ili., pp. 678-679. 
