42 
43 
44 
45 
46 
Aq 
48 
49 
+ No. 32 not included in the mean ; 
3s 
2s Mines and Localities. 
S 
Ag 
5 
1819 | United Mines in bottom of a shaft, K., 8 fathoms 
S. of lode..........cscocsescecscscsssceceres sEocecses 
1822 | Huel Friendship, near Tavistock, C.K., in etl 
level ...... Sanaa eanae cosbedenesaveveens aosnsaeesabaacels 
1830 | Poldice, at bottom of shafts Boe causccvetsccvenseee Sone seea 
1830 | Ting Tang, in deepest cistern...........+++++ seseccesses 
1820 | United Mines, in a level..........ssceceeecsceeeceneceees 
1837 }*T: resavean, Stythians, C., bulb of therm. 2 ft. 
10 in. in lode in killas, "at 3 fms. from a 
1837 \* Ditto ditto, in killas 10 fms. from granite... 
1815 | Huel Abraham, Crowan, C.K., at bottom ......... 
1824 | Stray-Park, Camborne, stream from E. end of 
deepest level.........cessesseseereeeeers Seek neeeseec 
1824 | Ditto ditto ditto W. ditto... 
1830 | Huel Vor, T.K., in deepest level .........seseeseeseee 
1837 |*Tresavean in granite, 20 fms, from killas, and 
12 ft. from lode, bulb 2 ft. 10 in. deep......... 
Means of depths and temperatures... 
1837 | Levant, St. Just., near Land’s End, T, and C., 
end of deepest level W. of engine- jae in 
killas, bulb 3 ft. deep .......c.cececesesscseeceees 
1837 | Ditto, near stream flowing into level E. of engine- 
Shaft, Granite ...ceccscoscsccesseccsersesscssonsves .s 
1837 | Ditto, near bottom of engine-shaft in granite, 
bulb 3 feet deep........ See uceaseensccescnceWasecee saws 
1822 | Dolcoath, Camborne, C., in deepest level, bulb 
3 feet deep in granite, from 19 to 20 months... 
1815 | Ditto, spring of water in bottom of engine-shaft... 
1837 |*Tresavean in lode in G., 100 fms. from killas, 
bulbyaifeet/ decpivceasatscccecevaseasabsatceucnacantes 
1819 | Dolcoath, water in bottom of engine-shaft ......... 
1837 |\*Tresavean in lode in G., 60 fms. from killas, bulb 
2ft. 10 in. deep ...... Suave enued eee ractheadusescas 
Means of depths and temperatures............... 
Means from 170 to 250 fms. from the surface... 
Deduct comp:ited temperature at 100 fms, 
deep, as given before .....ssesccesesceecerees } 
Difference ....... Sikes ask foa's 
Increase of temperature in the second 100 fms. 
Depth and temperature estimated before ...... 
Temperature deduced from the above at 200 
fins. deep ....+....- eed dedadaacveasasGrasearatnus 
1837 | Tresavean, in lode granite 60 fms. from killas, 
bulb 2:10 ft. deep...... DeiiVassnaanessmrenedvsereres 
1837 | Consolidated Mines, K., bulb 3 feet deep ina 
x level, 24 fms. from Isles j SEROMG. cxaston. 
1837 | Ditto ditto ditto 10 ditto.. 
18387 | Ditto ditto ditto, in the lode......... 
Depth in 
Fathoms, 
200 76° 
200 76 
210 74:2 
—— 203-33|— 75°-40 
220 78 
230 80 
230 76 
234 78-2 
250 82-5 
—— 232-80|____ 780-94 
218-06] 77°17 
100-00 66°75 
118-06 10-42)}) 
100-:00| = s-sal} 
100-00 66°75\h 
200-00 75-057 
262 82°-5 ) es 
at ze 
290 853 | as 
290 863 | &s 
290 92 ea 
EE 
BS 
Temperature 
of Rock, 
Fahrenheit. 
and a few other results omitted in the last columns, in consequence 5 
of their differing so much from the mean and from the temperature usually found at similar depths. 
« 
BS OOS 
