On Underground Temperatures. Table IV. 109 



1 





Y 



YI 



YII 



YIII 



Number in 

 the general 

 list, Table I. 



Rise of 



WcLLtJI X t/ld" 



tively to the 

 surface. 



Difference 

 between the 

 temperature 



at surface 

 and at depth. 



Rate of 



depth for 

 1° Fahr. 



Notes and remarks. 







Fahr. 



Feet. 





20S 

 213 



32 

 33 

 36 



+ 

 + 



+ 

 + 

 - 



9° 

 7 



6-7 

 5-9 

 10 



62 

 on 



49 

 35 

 54 



* The water comes from the Lande- 

 nian or Thanet Sands (at 544 feet), 

 but the bore is continued to a further 

 depth of 275 feet in the chalk. 



f The water rises from the Carboni- 

 ferous Jjimestone. 



X No information is given how these 

 observations at these pits were made. 



3, 



■ + 



30-9 



/no ,iy\ 



(2d '7) 

 (7 -2) 



58 



00 



61 





221 



+ 



31 '4 



60 





48 a 



+ 



4-3 



50 





49 



+ ? 



6 



30 





62 



+ '? 



6 



38 





48 

 42 

 43 

 31 

 68 

 69 

 161 



+ 

 - 



+ 



7-8 

 13 

 17 

 10 -4 

 32 

 51 



56-5 



53 

 46 

 59 

 44 

 57 



CO 



oa 

 50 



§ The lower part of the bore -hole, 

 which was carried to a total depth of 

 517 feet, was obstructed. M. Wal- 

 ferdin supposes the heat caused by the 

 boring instruments may have had 

 scarcely time to be dissipated, but he 

 assumed a higher surface temperature. 



!! At Torcy the works had been sus- 

 pended six months. At Mouillonge 

 three days. 



102 



+ ? 



28 -25 



31 





183 



+ ? 



5-4 



71 





180 



-5 



3'7 



51 





181 



+ 16 



6-9 



65 





65 



46 

 209 



+ 



+ ? 

 + tt 



31 



34-4 



21-60 



(9-0) 

 (12-6) 



53 

 68 

 45 



45-4 



63 

 33 



% The overflowing spring rose from 

 this depth. 



** M. Biver gives the rate of increase, 

 but not the surface temperature, nor 

 particulars of how the observations 

 were made. 



ff Although the water overflowed, it 

 was in such small quantity that it 

 was found necessary to take the tem- 

 peratures at depths. There were 

 small springs at 567 and 981 feet. 



