On Underground Temperatures. Table L 



71 





Y 



YI 





YII 





Depths 

 below 

 surface. 



Tempera- 

 ture at 

 depths. 





References and Remarks. 



94 



Feet. 

 2297 



Fahr. 

 t 





"Revue de Gfeologie, vol. iii (1864). 



95 



394 



8 4 -2° 





55 55 55 55 



96 



525 



50-5 





Zfo'd., vol. iv (1865), the water overflows. 



91 



144 



69*5 







98 



277 

 67 

 193 

 263 



71 '6 



75 

 76 



77-2 ^ 





Degoussee et Laurent, " Revue de Geol.," vol. iv, 

 p. 25 (1865). Discharge of water per minute, 

 respectively 150, 1200, 15, 50, and 270 litres. 



99 

 lOO 



lOl 

 102 

 103 

 104 



138 

 475J 



2812 

 971 

 2180 

 1650 



1944 

 2088 

 2214 



73 '4 



* { 

 «, { 



84-2 



73 '4§{ 



74 1 



n 1 



741 1 



85** J 



Ibid., p. 26 (1865). 



S terry Hunt, " Chem. and Gfeol. Essays," 1866, 

 p. 159. 



Letter from Mauget and Lippmann, Paris, January, 



1872. Overflowing mineral water. 

 "Revue de Greol.," vol. viii (1869). Overflowing well. 

 W. Warington Smyth, " Q.uar. Jour. Greol. Soc," 



vol. xxiv, p. 81 (1868). 



" Coal Commission Report," vol. ii, pp. 90, 192, 

 and 199. 



The work here had been open six years. 

 Work here had been open six months. ff 



105 



1250 



70 





" Coal Commission Report," vol. ii, p. 96. A new 

 pit. 



106 



1425 



73 





55 55 5) 



lO? 



1200 



7i 







lOS 



966 



62-5 





,, „ Yery wet shaft. 



109 



1030 







5) 55 55 



HO 



1002 

 1503 

 1605 

 1770 



6o§§ " 

 70 "5 



3 J 





Ibid., p. 104. Temp, of air in gallery. . 58° 



.. 58-5 



• • n 



** At 200 yards from the down-brow, the temperature was 80° in the coal and 

 84° in the floor. At 400 yards it was 82° in the coal and 86° in the floor. In a 

 tunnel at the same level, the temperature of the shale was 76° ; further on in 

 fireclay it was 79°, and still further in hard rock 82°. Holes from 3 to 4 feet 

 deep. Thermometers verified at Kew. Left 3 to 12 hours in holes perfectly 

 dry. 



+ f When open one year the reading gave 84°. 



XX This is the mean annual temperature of Nottingham. 



§ § This observation was not taken until long after the pit was sunk, and coal 

 evidently cooled. 



