8G 
On each occasion. There appears to have been more water in the 
spring at the time of Mr. Mallet’s visit (Feb,) than when our observa- 
tions were made (April) for he found it possible to take temperatures 
in seven places while we could only do so in five. 
This spring was formerly much hotter than it is now, but unfor¬ 
tunately the early observations are not at all definite : ‘ as hot almost 
‘as if it had been boiling ’ (commander of a vessel, 1832); ‘tempera¬ 
ture too high to be borne with the hand ’ (Playfair, 1837) ; ‘ natural 
boiling spring’ (Mouat, 3857) ; ‘ nearly at the boiling point’ (Liebig 
1858); ‘scalding hot’ (Parish, 1862). The observations made since 
1862 being more precise are here appended :— 
Date. 
Temperature of Spring. 
Authority. 
April, 1866 
158° F. and 163° F. 
Andaman Committee, 
Report in Proo. As. Soc. 
Beng. 1866, p. 213. 
March, 1873 
130° F. (highest observed) 
Ball, JRec. Oeol. Surv. 
India, vi, p. 87. 
February, 1884 
106°—116° F. 
Mallet, Mem. Geol. Surv. 
India, xxi, pt. 4, p. 26. 
April, 1886 
110° F. (solitary observation) 
Daley, Bee. Geol. Surv. 
India, xx, 48. 
April, 1891 
102°-106° F. 
Prain. 
The observations given in this table are not of quite equal value 
because they have not been taken on a uniform principle. The Anda¬ 
man Committee above referred to (Dr. Gamseks, Lt. Laughton and Mr. 
Homfray) describe the spring accurately as issuing from underneath 
the lava across the small bay, but though Mr. Ball (1. c.) speaks of 
them as recording the temperature “ at from 158° to 163° ” the state¬ 
ment in their report is that at low tide in one place the temperature 
was found to be 163° F., and at another 158° F. We cannot there¬ 
fore be certain that these figures give either the maximum or the 
minimum temperature in 1866, though it is highly pi’obable even if one 
of them represents a limit that they do not exhibit the full range of tem¬ 
perature at that time. Mr. Ball’s observation is rather more iDrecise ; 
the highest temperature is given as 130° F. taken close to high-water 
mark where the sjnung bubbles up; unfortunately he does not give the 
range of temperature in 1873. In connection with this it should be 
noted that Mr. A. 0. Hume, speaking of this very obseiwation, says 
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