On Underground Temperatures. Table I. 75 





T 







YII 





Depths 

 below 

 surface. 



Tempera 

 ture at 

 depths. 



- 



References and Remarks. 





Feet. 

 1989 



Fahr. 



8 5 ° " 







119 

 120 



2037 

 2202 

 2235 

 2283 

 2322 

 2349 

 2400 



1005 

 1455 



87 



88-5 

 89 



91 "5 

 9*'5 



92 ? 



93* . 

 65 



78 - 



> 



\ 



"Coal Commission Report," pp. 143 and 149. All 

 the holes were 1 yard deep and made air-tight. 

 Holes allowed to stand 8 hours before thermo- 

 meters were put in. Thermometers left 30 

 minutes. 



Distance 

 from shaft. 



Ibid., p. 157. Air in gallery. . 63° 270 yds. 



65 600 „ 



121 



1803 







Ibid., p. 194. 



122 



1944 

 2088 

 2214 



72 



78 

 82 

 84 





Ibid., p. 199. At 300 yds. from engine brow, 3 feet 

 deep. 



At 500 yds., hole 3 feet deep. 



At 1000 yds., hole 3 feet deep. 



At ydO yds. trom brow ; note 7 it. y in. deep. 



122a 



2130 



99 





Ibid., p. 85. Dry level hole, 4 ft. deep. 



123 



60 

 180 

 347 



47*9 

 53 '7 J 





Brit. Assoc. Report of 1869. Water in bore-hole. 





OV 



180 

 360 

 525 



48 2 



511 



55 '4 

 59'5 J 



i 



Ibid. Original depth 1040 ft. ; bore-hole silted 

 up to 525 It., and full of water. 



125 



570 

 770 



62-4 1 



66 





Ibid. A few feet of water in both shafts. 



126 



600 

 1674 

 1989 

 2235 

 2445 



66? ^ 

 /O 

 85 

 89 



94 J 





The temperatures (except the first) were taken 

 during the sinking of the shaft by drilling a 

 hole to the depth of a yard, plugging with clay, 

 and leaving the thermometer % an hour. 



121 



3029 

 3843 



107 ] 

 105 J 





Brit. Assoc. Report of 1870. Better data wanted. 



128 



5282 



85'i 





Brit. Assoc. Report of 1871. 



|| Coal Commission Report, A 4, vol. ii. 



IT Nos. 123 to 165a are from the reports of Prof. Everett, Secretary of the Com- 

 mittee of Underground Temperatures, in "Trans. Brit. Assoc.," 1869-83, inclusive. 

 ** Mean annual temperature of Glasgow, 

 ft Mean annual temperature of Belfast. 



XX This is the estimated mean temperature of the surface summit level. 



