APPENDIX. XXiX 
ATMOSPHERE. 
MONTHS. MOST DRy. LEAST DRY. IN A MEAN STATE. 
Afternoon. Morning. Night Forenoon. 
H. H. H. H. 
January 1°5 6° 7'5 12°7 
February 5°7 478 12°3 m7 
March 5°3 6-2 10 *4 10°5 
April os : 1252 4°7 8°7 9°3 
May 11°9 5°8 77) 8-6 
June 13 phe 7°4 959 
July AC . 2-7 6°5 8-2 10°4 
August... 10°7 5°7 9° 106 
September 1°7 5°3 9°9 | 10° 
October | 2°3 5°5 7°4 | 8-8 
November : 3:2 8: 10°3 11°3 
December 3° 52 make 10°4 
Mean 2°1 5°7 g’2 10°3 
The barometer is highest at Madras upon a mean of years on the 3d of January, and 
lowest about the end of May; the range being from 30,194 to 29,834 inches ; but in the 
storms that have occurred of late years, the barometer was depressed in an extraordinary 
degree for that place, as I shall more particularly notice before I close these remarks. 
The barometer is 0:142 inches higher, and the thermometer 7°18 lower, in the N.E. 
monsoon than in the S.W., as will appear by the following statement: 
Mean Height of the Thermometer and Barometer, during the N.E. and S.W. 
Monsoons, between 1796 and 1821. 
N.E. Monsoon 
Months. Thermometer. Barometer. 
Deg. Inches. 
October 81-858 29 °942 
November .. 98 672 29 °956 
December .. 75 843 30074 
January .. 75168 30 085 
February .. 77 °157 30076 
March me 79 °920 30°041 
Mean .. 78°103 30 029 
between 1796 and 1821. 
S.W. Monsoon between 1796 and 1821. 
Months. 
April 
May 
June 
July a 
August 
September .. 
Mean .. 
Difference 
Thermometer. Barometer. 
Deg. Inches. 
82 +417 29°955 
86 +918 29 °851 
88 159 29 861 
85 *645 29 867 
84 *732 29 879 
83 °825 29 "908 
85 283 29 887 
78-013 30 029 
7°180 0°142 
