74 



Prof. J. Prestwich. 



I 



Locality. 



II 



Place of observation. 



III 



Height of 

 surface 

 above 

 sea-level. 



IV 



Mean 

 annual 

 tempera- 

 ture of 

 surface. 









Feet. 



Fahr. 





Eosebridge Colliery, Wigan 



33 33 33 

 33 33 33 

 33 33 33 





157 



33 

 33 



48° 

 " 





33 3) 33 



33 33 33 

 33 33 33 



119. Sharlston Colliery, Barns- 





33 

 33 



240 



" 



L 



33 

 33 





leyf 











12 O. Victoria Colliery, "Wake- 





140 



m48'5 





field. 











121. Worth ington Colliery, Lan- 



33 3 ) 





48? 





cashire. 











122. Ram's Mine Lancashire 





175 



48 -6 





Pendleton Coiliery.§ 



33 3 3 33 





33 



33 





33 33 33 

 33 33 33 



122<z. Cornwall, Tresavean|| 



Copper and tin wine . , 



33 

 33 



33 

 50 





123^]". Blythswood, nr. Glasgow 



33 33 



Hore-hole 



? 



m47** 



33 





5» J) 



124. South Balgray ,, 





•• 



? 



33 





33 3) 33 

 33 33 33 





* * 



33 

 " 





33 3) 33 



" 









125. Carrickfergus, Belfast. . . . 







m48'8fi 





_ -i • -i TT7" " 





157 



33 



* 48 















33 



33 





33 33 



" 



33 



33 















121. St. Louis, U.S. America . . 



Shaft to 71 feet, then a 



481 



33 



m 55 



















9529 



33 



27 -3XX 









* The air at this depth was 18 to 22° lower than the rock temperature. 



f The holes in this and the following pit were in coal and 2 yards deep, and 

 perfectly dry. Thermometers left two days. 



% This was the temperature of a brackish spring issuing from a grit rock 2' 9" 

 thick met with in sinking the shaft, and discharging about 1600 gallons per hour. 



§ These observations were taken two years after those of Mr. Knowles ; the first 

 three were made in holes 3 feet deep. 



