68 CLIMATE. 



Pressure (Barometer). The greater part of the observa- 

 tions in the tables were taken at 10 o'clock A. M., it having 

 been ascertained, by a series of carefully conducted experi- 

 ments, that the barometer attains its mean daily height at 

 that hour. 



The range of the barometer on the hiUs appears to be con- 

 siderably greater than in the same latitude at the level of the 

 sea. I have no access to any accurate account of the range 

 on the Malabar Coast, opposite to the hills, but I believe it 

 does not exceed 0'250 of an inch. Now, on an inspection of 

 the annexed meteorological tables, it wiU be seen, that in 

 January, 1832, the barometer attained the height of 23.375, 

 the maximum of its elevation since my observations began, 

 while in the month of September previous, it had fallen as 

 low as 22'675, (corrected to 32° Fahrt.) shewing an extreme 

 range of 0'700. This range appears, however, to differ an- 

 nually ; being for three years as follows : 

 Tor 1831, it was 0-560. 



1832, 0'539. 



1833, 0388, giving a mean annual range 

 of 0-495.* 



As might have been anticipated, the barometer appears to 

 attain its maximum height in the cold dry weather of 

 January or February, and its minimum during or immediate- 

 ly after the S. W. monsoons. It generally begins to sink 

 gradually about the beginning of April, and continues de- 



* Dr. Dalmahoy statea the mean range at only 0-245 ; but as his 

 observations only extend to four months, and mine to upwards of 30, 

 with a very dehcate and accurate instrument, I consider my statement 

 as approaching more nearly to accuracy. The same observation applies 

 to all the succeeding meteorological results, in many of which I differ 

 slightly fi-om Dr. Dahnahoy. 



