On Underground Temperatures. Table I. 





y 



VI 



VII 





Depths 

 below 

 surface. 



Tempera- 

 ture at 

 depths. 



References and Remarks. 



13 



Feet. 

 1380 



Fahr. 



76° ^ 





14 



1632 



73 





15 



16 



16a 



11 



18 



19 



5> 



1530 



„ 



1572 

 2112 



79 *5 

 0) 74 

 (6)8 7 

 (*)8 5 



8»-4 | 



R. Were Fox, "Brit. Assoc. Reports for 1857," 

 p. 96; also "Coal Commission Report," vol. ii, 

 p. 211. 



(a) Near bottom of shaft. 



(b) Not far under the sea. 



(c) Far under the sea — no working going on. 



(d) A copious spring of water here gave 93 *5°. 



(e) A hot spring in another lode. 



80 



1728 



93 





81 



1530 



J 





82 



>> 



(e)n6 





83 



84 

 85 



288 

 762 

 900 

 1362 



90 

 2575 

 17 

 711 



64 -8 1 



67-5 ^ 

 67 | 



7* J 

 74 '5 1 

 53 J 

 88 ^ 



5i 



58 



Henwood, "Edin. Phil. Mag.," N.S., vol. vii, 

 p. 147 (1858). The mine is 1500 feet deep ; well 

 ventilated. No water : rainless district. Obs. 

 in holes in rock 2 feet deep. 



Wormley, " Amer. Journ. Science," 2nd Ser., vol. 

 xxx, p. 106 (1860). 



SD 



1119 

 1338 

 1734 

 2151 



C AO 



924 



60 



64 



«7 1 



72 [ 

 75 

 58 

 60 



Fairbairn : " Brit. Assoc. Reports," 1861, p. 53. 

 Observations made in holes on side of shaft ; 

 thermometer left from half an hour to two 



T~ mi 11 1 1 1 n t i • i n 



hours. The holes all dry and mostly m shale 

 or rock. No mention of temperature of air in 

 the shaft, or of the depth of the holes. 



81 



1000? 



1401 



2280 



62? 



66*5 J 

 88 ? 



Fairbairn, "Brit. Assoc. Reports," 1861. 



88 



2086 



83-5 



Delesse, "Revue de Geologie," vol. i, p. 9 (1862). 



88a 







Only the rate of increase given. See Table IV. 



89 

 90 



909 

 1460 



71-6 j 

 681F J 



Mallet, " Neapolitan Earthquakes," vol. ii, 

 p. 311 (1862). 



91' 

 92 

 93 



459 

 426 

 371 



"} 



73 '4 J 



L. Ville, " Ann. des Mines," 6th Ser., vol. v, p. 

 369 (1864). Overflowing wells. 



§ Overflowing salt water ; said to rise 52 metres above surface, 

 il The water rose above the surface. 



1[ Attributes this low temperature to the influx of water at different depths. 

 ** The mean temperature of Algiers is 64-5°. 



