30 Mr. G. A. Prinsep 07i the spontmiemis heating of Brine 



Seventh Experiment, 3rd Decemher, 2 p.m. at Narainpore. 

 Open round reservoir, tried in the centre, probe nearly perpendicular. 

 No. IT. 107 half full. 



2 



3 



4 



5 



G 



7 



8 



9 



10 



11 



V2 



13 



14 



15 



IG 



i: 



110 apparent S. G. 



114 



118 



125 half full. 



124 



116 



105 



9G 



92 



87 



8G 



84 half full. 



82 



81 



82 



82 



1151 atT. 

 1150 

 1143-5 „ 



1114 „ 

 1095 



1078-5 „ 

 1063-5 „ 

 1059 „ 

 1054 

 1053-7 



1052 

 1053 

 1052 

 1051 



106 

 110 

 118 



116 



112 



103 



93 



90 



In the first trial at Narainpore the greatest heat was found 

 about half-way from the bottom. The difference in that re- 

 spect at Balya Ghat, where the greatest heat appeared at the 

 second and third foot from the liottom, may be expLiined by 

 the small depth of the reservoir at the latter place, the surface 

 water being liable to be affected to the same depth in both 

 by the wind and rain and temperature of the atmosphere ; and 

 the subsequent descent of the maximum heat at Narainpore 

 is attributable in part to the expenditure of the brine there, 

 being pumped out from near the bottom for the supply of the 

 boilers. The highest temperature given by the probe at 

 Narainpore was 137°, but this is 5° less than the maximum 

 wiven by the pumps, as will be seen by the following state- 

 ment. 



G. (cor.) 1180 

 ., 1170 



29 Oct. N.pumpT 



12 Nov. ,, „ ,, 



19 „ „ „ „ 



26 „ „ „ „ 



3 Dec. „ „ „ 



10 „ ,. „ „ 



17 „ „ „ „ 



24 ,, „ „ „ 



31 „ ., „ „ 



7 

 13 



4 

 10 



130 

 138 

 142 

 140^ 

 137' 

 „ ,. ,. >. 124 

 „ „ „ „ 125 

 ,, „ „ ., 119 

 „ „ „ „ IIG 

 Jan. „ ,, „ 102 

 „ (sunk 2 feet) 104 

 Feb. 90i 



1162 

 1152 

 1133S.pumpl34S.G.1172 



1173 

 1153 

 1173 

 1174 

 1133 

 1177 

 1100 



124 

 124 

 116 

 114 

 106 

 100 

 92 

 90 



1158 

 1175 

 1171 

 1179 

 1128 

 1132 

 1119 

 1110 



As the temperature of 90° was only about the mean of 

 June, and also that of the lower moiety of the brine in the 



