68 



Prof. J. Prestwich. 



Locality. 



13. 1822. Cornwall, Dolcoath 



14. 1857 



15. 1853 



16. 1853 „ Levant 

 16a. „ 



11. 1857 



18. 1837 „ Tresavean 



19. 1853 



SO. 1853 „ United or 

 Fowey Consols. 



81. 1857 



82. ,, 



83. Chili 



84. Columbus, Ohio, U.S.A.*. 



85. Dukinfield, 1848 



86. Dukinfield, 1858. 



81. Eehme, Westphalia . . . 



88. Louisville, Kentucky § . 

 88a. Sahara Desert 



89. Naples, Largo Yittoria||, 



90. „ Eoyal Palace .. , 



91. Ben Tallah, Algeria . . , 



92. Baraki, „ 



93. Oued-el-Halleg, „ 



II 



Place of observation. 



Copper and tin mine. 



Another lode 



Copper and tin mine 



Copper mine 



55 5 5 



Colorado mine, 



55 5 ) 



5 5 5 5 ' 



55 55 ' 



Artesian well , 



5 5 55 1 



Coal shaft . . , 



A new shaft 



Artesian well 



III 



Height of 

 surface 

 above 

 sea-level. 



Feet. 

 280 



80? 



362 



3656 



834 



450 



* Walferdin's thermometers in strong iron case were used, but without protection 

 against convection currents ; left down 28 hours, 

 f The surface temperature of Manchester is M 48'6°. Dukinfield stands higher. 

 1 This is the temperature of Boehum. 



