g 
ON THE STATISTICS OF DUKHUN. 237 
quarters, east and easterly quarters, and the extreme rareness 
of winds from the north and south, and the points approxi- 
mating to them; and these features appear to be constant in 
successive years. In 5229 observations the wind blew from 
the west, or points adjoining, 2409 times; and in this number 
the S.W. (305), and N.W. (122), amount only to 427. From 
easterly points 949 times, including 246 from the N.E. and 
S.E., thus leaving 703 from the east. From the north 115 
times, and from the south 36 times only. Another feature is 
the frequent absence of wind, particularly at sunrise, and 
more so in the months of January, February, March, October, 
and November than in other months of the year. ‘The cessa- 
tion of wind from May to September inclusive is comparatively 
rare;,and, generally, throughout the year the absence of wind 
at 4:p.M., may be looked upon as unusual. In my records 
there are 1720 observations of ‘‘ No wind,” and 847 of these 
belong to sunrise, 452 to J—10 4.m., and 304 only to 4 p.m. 
The observations were continued through five years, three 
times daily ; sunrise, 9—10 a.m., and 4. p.m. There is consi- 
derable uniformity in the direction of the wind in the same 
months in consecutive years. The westerly winds begin to pre- 
vail in March, alternating with easterly winds, which blow the 
latter part of the night; but the easterly winds disappear as the 
monsoon approaches, and do not re-appear again till October. 
In October the winds are variable, and the records of ‘* No 
wind,” increase suddenly and rapidly. A few easterly winds, 
however, about the end of the month, indicate the change which 
is to take place; they gradually increase, and with those from 
the N.E. and S.E., almost entirely supersede the winds from 
the westerly points during the cold months. 
_ In March, from the sun’s approach, the interior land during 
the day gets heated ; an influx of air from the sea coast com- 
_ mences daily after 10 a.m.; but as the earth, at this period, 
| 
cools more rapidly than the sea at night, the interior is cooler 
than the coasts, and there is a reflux of air towards the 
ocean; the easterly and westerly winds thus alternate day and 
night. This alternation, however, diminishes in the ratio of 
the sun’s increasing power; and when the earth gets so 
thoroughly heated that it cannot reduce its temperature by 
radiation below that of the sea, the consequence is the preva- 
‘lence of winds from the westerly points to the almost entire 
exclusion of those from easterly points. In June the westerly 
winds set in regularly. There are occasional instances of the 
wind blowing with much steady violence from the west for 
