53 



Bath for placing instruments in to determine the climate ; but 

 it is the only one the Institution had at its disposal, and it 

 serves at least to tell the character of the Bath climate in the 

 lower part of the town, while we may hope some day to get 

 that of other and higher parts from other observers. 



Supposing, however, that the maximum temperatures during 

 such hot weather as we had last July were unduly influenced 

 by the situation of the instruments, and higher than they 

 ought to have been, the consequence would only be, allowing 

 for the error, to increase still more the diflference between 

 Bath and other places, and to prove the former to be relatively 

 yet cooler than we have made it out to be. 



To try, however, this question, I applied to Mr. Weston, of 

 Ensleigh, on Lansdown, well-known in Bath as an asti'onomer, 

 and a very accurate observer of meteorological phenomena, to 

 know exactly what had been the temperature with him on 

 some of the very hot days in July last, Ensleigh being, as 

 far as possible, the very opposite to the Institution Gardens 

 in respect of situation and altitude, on an open down, freely 

 exposed to the air on all sides, and estimated by Mr. Weston 

 to be 7-40 feet above the sea level. 



That gentleman kindly sent me his register for the whole 

 month, for comparison with the one kept at the Institution, 

 and it proved, on examination, that though the mean tempe- 

 rature of July at Ensleigh was P. 5 lower than in the Institu- 

 tion Gardens, the mean of all the highest was only C.T lower. 

 There were 13 days at Ensleigh, as at the Institution, on which 

 the thermometer rose to 80° or upwards ; though they were 

 not always the same days in the two cases. It is remarkable, 

 however, that on six of those days the temperature was actually 

 higher at Ensleigh than in the Institution Gardens ; on one 

 of them, July loth, the excess was as much as 2''.0, the ther- 

 mometer standing at Ensleigh at 89''.2, when in the Gardens it 

 was 87°. 2. This result surprised Mr. Weston, as it surprised 



