some Mines in Cornwall and Devonshire. 



521 



enumerated, and in which the bulbs of the thermometers 

 were either buried in the ground or plunged under water, and 

 into streams gushing into the mines. 



References to the letters. — C. Coppermine; T.Tin mine; 

 L. Lead mine; S. Silver mine; K. "Killas;" G. Granite; 

 w. Water; r. Rock or ground. 



Table. 

 Mines not exceeding 100 fathoms in depth from the surface. 



403 



369 



5 Mines, or 6 Stations : mean depth 67*1 ; mean temp. 61°«5. 



Mean temp, of climate 50* 



Excess 11-5= l°in35ft. 



Mines from 101 to 200 fathoms in depth : 



[. ... 120 w. 

 [. ... 120 w. 



B ... 128 w. 



Beer Alston ..L.&S. . 



Huel Squire C 



Chasewater T.&C. "I 



Eastern end of deepest level J 



Western end of do. 



Huel Trumpet T. . 



Huel Vor T. . 



Tingtang C. 



Treskerby C. . 



Pol dice, bottom of a \ rp s n 



shaft J 1 "* u " 



Do. do. another 



Consolidated mines C. 1 



Bottom of a shaft ) ' 



Do. of another do. 



Huel Damsel C. 



Huel Alfred \ Q 



Eastern end of a level J * 

 Do. do. "I 



Western end of a level J 



K. 

 G. 

 K. 

 K. 

 G. 



K. 



G. 

 K. 



w. 

 w. 

 w. 

 r. 



128 

 128 

 139 

 140 

 140 w. 



144 w. 



144 w. 



150 w. 



150 w. 

 150 r. 



155 w. 



66o-5. 

 68 



75 



68 

 65 



69 



66 , 

 76 , 



78 . 



80 , 



76 



80 ■ 

 70 '. 



70 



155 w. 67 



1822. 

 1820. 



1827- 



1827. 

 1822. 

 1819. 

 1820. 

 1819* 



1822. 



1822. 



1822. 



1822. 

 1820. 



1827. 

 1827. 



Carried over 



2091 



1074-5 



* The mean temperature of the climate in a large proportion of the 

 mining districts of Cornwall and Devon is rather below 50° I believe. 



Third Series. Vol. 11. No. 70. Dec. 1837. 3 X 



