On Underground Temperatures, Table 1. 



(13 



Depths 

 below 

 surface. 



Feet. 

 1797 

 1380 

 1572 

 1740 

 880 



600 



246 

 830 



50 



77 

 119 

 182** 

 231 

 270 

 380? 



1105 

 354 



438 

 684 

 410J 



216 

 177§ 



480 



810 

 1704 

 1764 

 10S0 

 1260 



804 



864 



222 



480 



600 



180 



660 



702 



774 



834 



VI 



Tempera- 

 ture at 

 depths. 



63 -7t 



55 * 3 

 57 '2 

 61 



70-7 

 89 



r-'s 

 74 



89-5 



70 



73 



5 6 '5 



63 

 66 



55 "5 



66 



62 



68 



7i 



YII 



Eeeeeences and Ee hakes. 



Walferdin, " Comptes rendus," 1837, p. 977 ; and 

 Arago. 



Henwood, "Report Brit. Assoc.," 1837. 

 Thermometer buried in rock. 



Bischof, " Edin. New Phil. Mag.," vol. xxiv, p. 132 



(1838) . 



Q-irardin, " Comptes rendus," 1838, p. 507. 

 Walferdin, " Comptes rendus," 1838, p. 503. 



Erman, f< Comptes rendus," 1838, p. 501. 



E. Paterson, " Edin. Phil. Mag.," vol. xxvii, p. 71 



(1839) . 



Only the rate of increase given. 



Biver, " Comptes rendus," vol. x, p. 41 (1840). 



Fox, " Brit. Assoc. Eep.," p. 310 (1840). Average 

 of 53 mines. Only the rate of increase is given. 

 In these cases see Table III. 



Walferdin, " Bull. Soc. Geol. France," vol. xi, p. 29 



(1840) . 



Arago, "Notices Scientifiques." 



Lassaigne, " Comptes reudus," October, 1842. 



Small stream from lode. 

 Small stream from rock. 

 Moderate stream from lode-end. 

 Large stream from lode-end. 

 Yery large stream from cross-cour.se. 

 Moderate stream from lode-end. 



Large stream from rock. 



Moderate stream from lode-end. 

 Large „ „ 

 Small „ ,, „ 



Small stream from lode. 

 Large „ 



Moderate,, „ ,, 

 Small ,, ,, 



t Thermometer not protected, but pressure allowed for ; remained down 16 hours. 

 X The last 107 feet were obstructed, so that the actual depth was 517 feet. 

 § Water overflows. 



