IS'OTES ON THE CLIMATE OF VICTOEIA. 
9 
HUMIDITY. 
Next in importance among the meteorological elements as 
regards climate is probably that of humidity. The results obtained 
from hygrometrical observations at the various stations are here 
mven in Table V. 
o 
Table V. — Mean Relative Humidity for Different Stations. 
Stations. 
January. 
g 
rd 
Q 
April. 
May. 
.June. 
July. 
1 August. 

September. 
Ol 
o 
o 
O 
November. 
December. 
Mean 
Annual 
Humidity. 
Melbourne 
0-64 
0-66 
0*67 
0-73 
0-78 
0*81 
0*81 
0*70 
0*72 
0-71 
0*60 
0*65 
0*72 
Portland . . . . 
0-77 
0-78 
0-78 
0-79 
0*83 
0*83 
0*83 
0*82 
0*79 
0*77 
0*81 
0*77 
0*80 
Cape Otway . . 
0-86 
0-84 
0-84 
0*84 
0*84 
0*85 
0'8{5 
0*83 
0*86 
0*88 
0*84 
0*85 
0*85 
Port Albert 
0*78 
0‘75 
0*75 
0-80 
0*79 
0*82 
0*84 
0*83 
0-79 
0*81 
0*78 
0*80 
0*79 
Gabo Island . . 
0-87 
0’88 
0-89 
0-89 
0*90 
0*89 
0*89 
0*88 
0*89 
0*88 
0*88 
0*88 
0*88 
Ballarat . . . . 
0-67 
0*64 
0-66 
0-7G 
0*82 
0*89 
0*87 
0*80 
0*80 
0*73 
0*67 
0*65 
0*75 
Sandhurst 
0-51 
0-52 
(1-57 
0-71 
0*75 
0*8*2 
0*81 
0*75 
0*72 
0*67 
0*55 
0*52 
0*66 
Beechworth . . 
0-63 
0-50 
0-54 
0-60 
0-75 
0*74 
0*80 
0*75 
0*72 
0*61 
0*55 
0*55 
0*65 
The mean temperature of the dew-point at Melbourne for each 
month has been found to be — 
September... 43' 9 
October .46'7 
November ...48’5 
Spring 46'4 
December... 50*7 
January ...52*9 
February ...52-9 
Summer ...52-2 
March yl’6 
April 49*G 
May 46*1 
Autumn ...40*1 
June 43*8 
July *41-7 
August. ..42-2 
Winter.. .42-6 
Giving a mean annual temperature of the dew-point of 47°*6. 
Tlie humidity of the air is subject to very great and rapid 
variations, especially during the summer months, when it is not 
at all unusual that it is reduced from 60 to 24 per cent, in a few 
hours; and frequently during the occurrence of hot winds, with a 
daily mean of 80 or 40 per cent., it has been reduced as low as 13 
or 15 pei‘ cent. In sucli cases of minimum humidity, liowever, 
the daily mean or even an excessive humidity immediately follows 
the change of wind. 
PRESSURE OF AIR. 
The mean pressure of air in Melbourne from discussion of four- 
teen years’ observation appears to be 29‘931 inches; this, reduced 
to the sea level, becomes 30*022 inches. Tables VI. and VII., 
appended, give the mean monthly and annual pressure, and 
monthly and annual range for the several meteorological stations 
in the colony. 
