THE METEOROLOGY OF EDINBURGH. 



87 



N. 5, N.E. 8, E. 12, S.E. 9, S. 9, S.W. 20, W. 28, N.W. 9. The wind vane on the steeple 

 of St Giles' Cathedral was the instrument employed in the determination of the 

 direction. 



Gales. 



In addition to the direction the force of the wind is also given. The scale ranged 

 from to 4. The days on which the force was entered as 3 or above were picked out 

 for the five years. The total was 154, equal to an annual average of 31. Their distri- 

 bution throughout the year is shown in the followiug table : — 



Jan. 

 13 



Feb. 

 33 



Mar. 

 19 



Apr. 

 9 



May. 

 12 



June. 

 1 



July. 

 6 



Aug. 

 i 



Sept. 



14 



Oct. 

 12 



Nov. 



15 



Dec. 

 16 



Fog or Mist. 



The total number of fcgs recorded was 57, an average of 11 per annum. They were 

 distributed throughout the year as follows : — 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec 



6 







7 



11 







3 



1 



2 



5 



3 



11 



8 



The cold weather fogs of winter and those associated with the easterly winds of 

 spring manifest themselves very clearly during the period under review. 



Therm.al Windrose. 



The mean temperature of the winds is given in Table LIL, the observations utilised 

 being those taken at 9 a.m. The 8 a.m. observations taken by Hoy at Hawkhill for 

 seven years, 1770-1776, have also been analysed with reference to the temperature of 

 the various winds (see Table LIIL). The values given in the Tables refer to the months 

 and the seasons, and it may be pointed out that the latter means are not the averages of 

 the months comprised in the season but have been derived by taking the gross totals 

 and dividing by the number of days, which gives the true average temperature of the wind. 

 A comparison of the seasonal values derived from these old registers with similar means 

 calculated from the 9 a.m. and 9 p.m. observations from July 1887 to June 1894 # gives 

 the following results : — 





Spring. 



Summer. 



Autumn. 



Winter. 



Coldest. 



Warmest. 



Coldest. 



Warmest. 



Coldest. 



Warmest. 



Coldest. 



Warmest. 



1731-36 

 1770-76 

 1887-94 



N.W. 43-0 



N.W. 38-9 



N. 40-9 



S.W. 48-8 

 S.W. 46-4 

 S.W. 47-2 



N.E. 55-0 

 N. 557 

 E. 527 



S. 61-0 



S. 59-4 



S.W. 58-6 



N.W. 40-3 



N.W. 42-6 



N. 42-3 



E. 46-8 

 N.E. 49-8 

 S.W. 50'5 



N. 32-0 

 N. 33 4 

 N. 337 



S.W. 40-8 

 S.W. 39-2 

 S.W. 43-3 



VOL. XXXIX. PART I. (NO. 6). 



* Trans., vol. xxxviii. p. 750. 



