MR. G. V. VERNON ON THE DIRECTION OF THE WIND_, ETC. 99 



VIII. — On the Direction of the Wind at Manchester, during 

 the years 1849-1861^ at 8^ a.m. By G. V. Vernon, 

 Esq., F.R.A.S., M.B.M.S. 



Eead before the Physical and Mathematical Section, February 6th, 1862. 



The direction of the wind has been referred to sixteen 

 points of the compass in the observations, but only eight 

 have been nsed in this investigation, this being considered 

 quite sufficient for the object in view. 



In January, the wind which blows upon the largest 

 number of days is the S.W., and the least prevailing winds 

 the N. and N.E., the former occurring upon the least 

 number of days. 



In February the S.W. wind is still the most frequent, but 

 blows on a less number of days than in January : the least 

 frequent winds are the N. and W. ; the former, however, 

 shows an increase on January, and the latter a decrease. 



In March the most prevalent wind is still the S.W., 

 and the least prevalent the N. ; the N.W. wind also occurs 

 upon more days than either in January or February, 

 having progressively increased each month : E. winds also 

 occur on rather more days than in either of the two pre- 

 ceding months : S. winds also show a diminution from the 

 beginning of the year. 



In April we find the most prevalent wind to be the 

 N.E., and the least the N., as in the preceding months; 

 there is also a large increase in E. winds. The S.W. 

 winds come next to the N.E. in amount, but occur on 

 fewer days than in March : this wind has diminished from 

 the beginning of the year, the monthly figures being 8*3, 

 7-6, 6*3, and 5'i respectively. The N.W. winds, which 

 gradually increase in amount in the preceding months, 



H 2 



