lxiv 
It has been held that the members of Provincial Institutions, 
such as our’s, employ themselves to most advantage within their 
own respective neighbourhoods ; such limits I have studied not to 
transgress. 
As you have already permitted me to speak of Mines and 
Mining in Cornwall, I hope you will not forbid my saying a few 
words respecting our Mine-agents and Miners; but I must not do 
so without acknowledging the value and truth of the testimony 
offered in their favour aforetime ;—by Mr. Carne,* one of the 
Notes to Page \xii., continued. 
At» Wheal Vor two of the engines performed, in November, 1859, the 
undermentioned duty ;— 
TRELAWNY’S ENGINE (85 inches BoRLASE’S, or CREASE’S ENGINE, © 
cylinder. (100 inches cylinder), 
Date. Durty Date. Dury 
Coal. | strokes. Per Per Coal. | strokes, Per Per 
Tons. bushel. | Cwt. Tons. bushel.}| cwt. 
Ist ..| — — _ — Ist .. ra 
— | 2na.| 12:6 |10,180] 58-8 | 70- 
2nd = — — 
3rd..| 22° |20,780} 58:8 | 70- Sree | = = a 
Ath. — = — — A4th..| — a == = 
5th — — Eig) —= = = — 
6th..| 22°5 |20,530| 56°3 | 67: 6th..| — — — 
-| — — — 7Tth..| 36°7 |29,500} 58:8 | 70- 
8th..| 16° |14,330| 55:4 | 66: 8th..| — —_ — 
9th...) — — = = 9th..| 14:2 {10,740} 58°8 | 70- 
10th..| 16:2 |16,080} 61°3 | 73: }10th..) — — — — 
This instructive statement has been courteously furnished me by Mr. William 
Argall, Cashier and Chief Accountant at Wheal Vor. 
At Morro Velho, in Brazil, the weight of vein-stone crushed by each 
stamp-head is registered daily. Reports of the Saint John d’el Rey Company, 
ix., xl., Passim. Cornwall Geol: Trans: viii., Table vii. 
On the London and North Western Railway each engine-driver gives a 
daily account of the fuel consumed and the work performed by his engine. 
Mr. Francis TrrevitHicr, C.H., of Penzance, MS. 
§ Henwood, Phil: Mag: and Annals, ix., pp. 170-177; Lond: and 
Hdin: Phil: Mag: i., pp. 287-295; Cornwall Geol: Trans: v., pp. 413-444. 
|| ‘“‘Hingine-men [formerly] received ‘“ duty-money.” MorsHEap, Pro- 
ceedings of the Inst: of Civil Engineers, xxiii., p. 47. 
* “Tn mentioning the improvements in mining, the increase of miner- 
“ alogical knowledge amongst the working miners, ought not to be omitted. 
“Many of them are no longer satisfied with the common names of minerals, 
“but are now acquainted with the scientific names of the common ores and 
“earthy substances, and even with their constituent parts. Some havea 
“‘gained this knowledge from others; but many possess their systems of 
“mineralogy, which they study at their leisure.” Carne, Cornwall Ceol: 
Trans: ili., (1824), p. 85. 3 
