On Underground Temperatures . Table II. 



80 



Those observations in which there are readily-apparent errors, or 

 which are repeated more correctly at later dates, are not "brought 

 forward from Table I. Nor has it been considered necessary to repeat 

 the fuller particulars there recorded, nor other observations, except 

 such as bear upon the rate of increase of temperature with depth. 

 The numbers in the first column will readily enable the reader to 

 refer back to these details in the first general list. 



The thermometric gradient is in all cases calculated upon the 

 mean surface temperatures, and allowing for height above the sea- 

 level. 



PITS AND SHAFTS. 



consist of the usual shales, sandstones, and coals of the Coal-measures, 

 ticulars are given in Column II or in the notes. 



from the shaft, showing the distance the air has to travel before reaching 



mometer, and whether placed in the coal, rock, or water. 



temperature between the two depths given in italics in Column III, 



Column IX ; the figures in thicker type refer to the gradient of the entire 





T TI 



Position and 

 depth of hole 

 for thermometer. 



Til Till 



Temperature at 

 depth 



IX 



Eate of 

 increase of 



X 



Notes and remarks. 





Coal (C). 

 Eock (R). 

 Water (W). 



Depth. 



of coal, 

 rock or 

 water. 



of air in 

 gallery. 



depth in feet 



for each 

 degree Fahr. 









Feet. 



Fahr. 



Fahr. 



Feet. 







14 W 



15 „ 



16 „ 

 1? „ 





60° 

 60 

 68 

 74 



70° 

 77 



42 

 44 



46 

 47 



* At Whitehaven and Work- 

 ington the Coal-measnres are 

 unconformable overlaid hy 200 

 to 300 feet of Bed Sandstones 

 and Marls. 





ISO E 



10 



75 

 79 



(4-0) 



75-5 

 78-5 



49 

 47 



37 







21? . . 





61 





45 







30 E 





72 -6 





62 







116 C 



3 



>5 



60 

 68 



50 

 69 



85 

 55 





