METEOROLOGICAL OBSERVATIONS ON BEN NEVIS, 



95 



January 



February 



March 



April 



May 



June 



At both observatories February was the coldest month of the year. 

 In this month northerly winds were seven days in excess of the average 

 prevalence, and winds from south and south-west correspondingly defec- 

 tive. May and July M-ere both exceptionally warm months, the general 

 type of weather being eminently anticycJonic, with a very large excess of 

 sunshine. The absolutely highest temperature for the year at Fort 

 William was 79°-6 on July 20, and at the top 63°-0 on July .3, and the 

 lowest at Fort William 15°-2 on March 29, and at the top G°-3 on 

 March 25. 



In Table III. are given for each month the lowest observed hygro- 

 metric readings at the top of Ben Nevis : — 



Table III. 



Of these relative humidities the lowest, 14, occurred on March 21, 

 with a dew-point of — 14°-4. The lowest dew-point of the year was 

 — 15°-6 on December 22, the dry bulb being 21°-.3 and the wet bulb 

 lG°-7. A noticeable feature of the table is the unusually high values of 

 the minimum humidities in September and November. In the former 

 month the atmosphere on the top of Ben Nevis was continuously saturated 

 from the evening of the 5th till noon on the 11th, and then almost con- 

 tinuously until the 14th. From the 17th to 29th inclusive there were 

 only a few scattered hours at which the humidity was not 100. In 

 November, the 8th to 14th and 17th to 30th were periods of continuous 

 saturation. 



Tho rainfall for the year at the top was 156-43 inches, being 

 less than the average by 1-27 inch. This rainfall was no less than 

 53-90 inches below the very heavy amount recorded for 1900. June was 

 a very wet month, the rainfall of 13^19 inches being 5-32 inches above 

 the average and greater than any June rainfall except that of 1892, 

 14-07 inches. February and July were comparatively dry months, with 

 amounts 5-91 inches and 6-02 inches below their respective averages. 

 The greatest faU recorded in a single day was 4-77 inches on March 5. 

 At Fort William the annual rainfall was 67-46 inches, being 9-88 inches, 

 or 13 per cent., below the as'erage. 



