On Underground Temperatures. Table III. 



99 





I 



Y 



VI 



VII 



VIII 



IX 



X 





Number 



Position of 

 thermometer. 



Temperature 

 depth 



Rate 

 of 

 increase 







in 

 general 



list, 

 Table I. 



Water (W). 

 Spring (S). 

 Rock (R). 



Depth of 

 hole in 

 rock. 



Of the 

 rock or 

 water. 



Of air 



in 

 gallery. 



OI 



depth 



for 

 each 

 degree 



F. 



Notes and remarks. 









Feet. 



Fahr. 



Fahr. 



Feet. 







22© 



33 

 33 

 33 

 33 



R 



>j 



3? 



67-8° 



83 



90 



(15-2) 

 (22 -2) 



•• 



49 

 64 



56 



89 

 53 







19 



53 

 33 



R 

 W 



3 

 3 



58 

 78 

 82 





34 

 48 

 44 







122a 

 20 



21 



R 



W 



?> 



33 





99 



63 

 69 



72° 



61 



70 



43 5 



42 

 45 



33 

 46 



* In the list given in 

 page 34, the mean be- 

 tween these two depths 

 (1350 ft.) is taken. 





92 



49/ 



R 



S 

 )> 





79 



55 5 

 66 





40 



40 

 44 



f One level extends 

 about 2000 feet under 

 the sea. 





49<7 



497i 

 49i 



?) 

 >? 



33 

 33 



• • 



• • 



62 



71 



73 



59 



. . 

 •• 



59 



40 

 36 

 41 



X Thermal springs have 

 been met with in several 

 of the mines in this dis- 

 trict. 





49y 



49& 

 49Z 



3) 

 33 

 33 





61-5 

 72 



86-5 

 92 





48 

 35 

 40 



39 



§ The great Grwennap 

 adits used to drain many 

 of the mines in this dis- 

 trict. 





49m 



3 J 





72 





42 













65-5 





42 







49« 



33 

 33 





61 



70-7 





44 

 39 







495 



33 





89 



92 5 





44 -5 

 41-5 







49c 



33 





74 

 89-5 





45 

 32 







49d 



33 





70 

 73 





44 

 39 





H 2 



