1838.] 



On the spontaneous heating of Brine. 



209 



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



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

 No. l T. 107 half full. 



2 



no 



apparent S. 



G. 1151 



at T. 



106 



3 



114 



>> 



1150 



»> 



110 



4 



118 



„ 



1143.5 





118 



5 



125 



half full. 









6 



124 



>» 



1114 



,, 



116 



7 



116 



»> 



1095 



,, 



112 



8 



105 



»t 



1078.5 



>» 



103 



9 



96 



,, 



1063.5 



>> 



93 



10 



92 



, f 



1059 





90 



11 



87 



»> 



1054 







12 



86 





1053.7 







13 



84 half full. 









14 



82 



»> 



1052 







J5 



81 



>> 



1053 







16 



82 



»» 



1052 







17 



82 



>> 



1051 







In the first trial at Narainpore the greatest heat was found about half- 

 way from the bottom. The difference in that respect at Balya Ghat 

 where the greatest heat appeared at the second and third foot from the 

 bottom may be explained, 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 given by the pumps, as will be seen by the following 

 statement. 



29 Oct. 



N. 



pump 



r. 130 



S. G. 



(corrected) 



1180 



12 Nov. 



M 





»> 



„ 138 



,, 



,, 



1170 



19 „ 



> t 





>> 



, 142 



»» 



>> 



1162 



26 „ 



» 





a 



, 140£ 







1152 



3 Dec. 









, 137 



»> 



., 



1133 S. P 



10 „ 



>> 





j» 



,124 



if 



>» 



1173 



17 „ 



>> 





,, 



, 125 



>» 



>> 



1153 



24 „ 



>» 





>> 



, 119 







1173 



31 „ 



>> 





»! 



, 116 



>> 



>» 



1174 



7 Jan, 







,, , 



, 102 



tt 





1133 



13 „ 



(sunk 



2 fee 



t) 104 





»> 



1177 



4 Feb. 









90§ 







1100 



JO „ 

















mp 134 

 124 

 124 

 116 

 114 

 106 

 100 

 92 

 90 



1172 

 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 covered reservoir on the 

 19th November, which was all nearly of an equable temperature, I con- 

 sider the influence of the heating course to have ceased in the first week 

 of February, if not before. The reservoirs have since been pumped dry 

 and therefore these experiments cannot be repeated, until they are reple- 

 nished with brine in April or May next. 



