RELATION TO THE DISTRIBUTION OE BAROMETRIC PRESSURE. 
337 
Part I.—The Wind Direction Anomaly. 
The hot winds of the Indian plains have been often described by travellers and 
writers on Meteorology, but the existence of such a condition as that mentioned 
above, viz., their blowing directly against the baric gradient, has been doubted by 
competent authorities, or at all events suspected to be only an erroneous deduction 
from a comparison of monthly mean pressures with the resultant wind directions. 
The daily weather telegraphic reports of the last few years, however, leave no room 
to doubt that, almost every year, there are several days in April, May, or June when 
this primd facie impossible condition obtains over a large extent of country at 10 A.M., 
while, from the known character of the diurnal variations of pressure and wind 
direction, we may safely infer that the condition is much more frequent and more 
distinctly marked in the early hours of the afternoon, the diurnal fall of the barometer 
increasing slightly as we advance inland from Bengal, and the wind direction being 
steadiest from the north-west about 2 p.mA 
The following examples, selected from the 10 a.m. telegraphic reports, will prove 
the existence of this paradoxical condition of atmospheric circulation. The stations 
are enumerated in order from west to east, the general direction of the lines joining 
them being about W.N.W. to E.S.E. The pressures are reduced to sea-level. 
Table I.—Instances of Wind blowing in opposition to Baric Gradient. 
May 17, 1882. 
Station. 
Barometric pressure. 
Wind direction. 
Meerut. 
Inches. 
29-753 
NW. 
Bareilly. 
29-758 
NW. 
Lucknow. 
29-759 
W. 
Goraklipur. 
29-785 
WNW. 
May 9, 1883. 
Station. 
Barometric pressure. 
Wind direction. 
I nclies. 
Meerut .... 
29-581 
NW. 
Bareilly . 
29-597 
NW. 
Lucknow. 
29-631 
WNW. 
* ‘ Indian Meteorological Memoirs,’ vol. 1, pag'e 353, and Plate XXX. 
MDCCCLXXXVII.—A. 2 X 
