SUPPLEMENTARY REPORT ON METEOROLOGY. 107 
for each hemisphere an invariable concomitance of the meteor- 
ological phenomena of temperature, pressure, humidity and 
rain for every direction of the wind. This research was 
indeed by no means new. Von Buch had shown the depend- 
ence of the barometer on the direction of the wind; even the 
poets could distinguish the thermal and hygrometric charac- 
ters of Boreas and Zephyr ; and it is easy to see that as far as 
the characters of North and South go, these particulars must 
be altered in the southern hemisphere. In my former report 
I have shown, from the researches of the German meteorolo- 
gists, that the mean direction of the wind for the whole year 
depends on the climate*, and I might have added that the sea- 
son exerts an important influence :— 
207. Thus at Berlin the mean direction of the wind is + 
Proportion of 
E. to W. Winds. N. to S. Winds. 
Winter S. 33° W. ... 100: 137 .. . 100: 190 
Spring S. 73° W. ... 100: 132... 100: 113 
Summer N. 83° W. ... 100:277... 4100: 85! 
Autumn S. 50° W. ... 100: 160... 100: 167 
Each season therefore has its predominant wind, as it has its 
characteristic temperature, pressure and moisture. It is Prof. 
Dove’s object to prove that these follow as cause and effect, and 
hence that any law affecting the succession of winds must affect 
the succession of other meteorological phenomena. It must 
be owned that the following table of one year’s observations at 
Calcutta give a strong probability to the general mutual de- 
pendence of these phenomena upon one another in those regions, 
where atmospheric laws are usually exhibited with vast dis- 
turbance, and therefore more correctly (at least in proportion to 
the time that the observations have been continued). 
Temp. Rain, | Barom. liga ee ticki! NE | 
‘mana git Inch. Inch. |Direction reckoned Approx. 
from S.by W. | Direction. 
January...| 666 | ..... 30:08 156° N.N.W. 
February .| 75 2:9 30°02 80 W.S.W. 
March ...| 79 0-5 29°95 355 Ss. 
April ...... 82:5 8-0 29°83 337 S.S.E 
WVTAY, o)s0s20. 86 6:0 29°77 348 S.S.E 
June ...... 83 24-4 29°58 321 S.E 
215 eee 83 12:8 29:59 314 S.E 
August 83 9:3 29°62 299 E.s.E. 
September.] 83 117 29°71 285 E.S.E. 
October ...| 83 1-4 29-91 94 w. 
November.| 75 0:5 29-98 118 W.N.W. 
December.| 69 Sets 30°01 1385 N.W. 
* P. 246. 
+ From the Observations of Beguelin, for17 years. See Kamtz and Mahlmann. 
