186 



REPORT 1869. 



" Temperature by Insulated Thermometer 100 feet below Surface. 



Increase 

 per diem. 



51-21 

 51-40 

 51-44 

 51-52 

 51-54 

 51-58 

 51-85 

 52-00 

 51-92 

 51-94 

 52-10 



0-021^ 

 0-008 

 0-011 

 0'003 

 0-006 

 0-024 

 0-021 

 0-011 

 -0-003 

 + 0-025 



Increase, April 3 to June 11, 

 0-89 or 0°-013 per diem. 



The main results of the experiments in the bore-tube are shown in the 

 follo'niug Table : — 

 " Abstract of Kesults obtained at Kentish Town "Well, Jan. 1 to June 30, 1869. 



Eemarks. 



" (a) First observation in the water. 



" {h) Water becomes muddy. 



" (c) This water-measurement seems erroneous. 



" (d) On attempting to lower the thermometers to 1100 feet, found the mud supported 

 them, and the cord became slack. The observations to which an asterisk is attached were 

 obtiiined by leaving the cord so slack as to allow the thermometers to bury themselves in 

 the mud; but there is much risk in attempting to withdraw them." 



