398 Proceedings of the Boyal Physical Society. 



In October mean pressure was again in close accordance 

 with the normal, temperature being a little below the average. 

 During the month 4*9 inches of rain fell, being double the 

 average, and the greatest in October since 1864. Sunshine 

 was rather deficient. 



Novemler was characterised by an excess of pressure, a 

 high mean temperature, barely half the average amount of 

 sunshine, accompanied by an enormous rainfall, more than 

 double the average quantity being precipitated. The total 

 downfall for the month was 5*42 inches, being the greatest 

 in November since 1772, when 5*66 inches fell. 



In Decemher mean pressure and sunshine were in close 

 accordance with the normal, but the extreme mildness of the 

 air and large rainfall were again noticeable features. The 

 mean temperature was 44°-3, or 5° -9 in excess of the average, 

 the only warmer Decembers since the register commenced 

 in 1764 being those of 1842, 1843, and 1857. The rainfall 

 amounted to the large quantity of 4*43 inches, or 79 per cent, 

 above the average. 



During the last quarter of the year, 14-72 inches of rain 

 fell, against an average of 7 "5 2 inches, an excess of 96 per 

 cent. Eeference to the monthly rainfall tables taken in 

 Edinburgh since the year 1785 shows that the greatest 

 downfall previously recorded for the last quarter of the year 

 was 13*38 inches, in 1860, or an inch and a half less than in 

 1900. 



The values for the year as a whole show a defect of 

 pressure of '014 inch; a mean temperature exceeding the aver- 

 age by close on a degree; a total rainfall of 38*72 inches, 

 being 8*80 inches above the average, and the greatest since 

 1877, when over 42 J inches fell. During the year, only 1013 

 hours of bright sunshine left their impress on the recorder, 

 out of a total possible of 4478, this being the smallest amount 

 of sunshine since 1867, when the non-instrumental record 

 showed a total of only 980 hours. In both these years the 

 deficiency of sunshine was most marked in the three summer 

 months of June, July, and August, the total for the period 

 under review being 283 hours in 1867, and 332 hours in 

 1900. 



