METEOROLOGY OF BEN NEVIS IN CLEAR AND IN FOGGY WEATHER. 



785 



the spring half of the year than in the autumnal half. There is also less continuous 

 foggy weather in the spring half, there being a well-marked minimum in May. The 

 months of August and especially September are rich in continuous foggy weather, and 

 this accounts for the very bad reputation of the mountain among tourists. The month 

 which figures in our lists with the maximum of foggy spells is November, the maximum 

 of clear spells falls in June. 



The distribution of the spells of clear and of foggy weather in the months of different 

 years is worth attention. In January there were no spells of twenty-four hours clear 

 weather in the six years, 1889 to 1894 (inclusive). In March, May, June, and July, 

 there is one year without a spell of clear weather ; in February, April, August, and 

 September, there are two years ; in October and November, three ; and in December, five 

 years without a spell of clear weather. With regard to the spells of foggy weather of 

 three days and upwards, we find only one year where they were awanting in January. 

 In March, April, September, November, and December, there are two years ; in June and 

 August, three years ; in February, July, and October, four years ; and in May, six years 

 where they were awanting, 



Adding up the total number of hours of clear weather and days of foggy weather 

 considered, we find that they make 681 and 747 days respectively, or a total of 1428 

 days out of 4748 days contained in the thirteen years, or, roughly speaking, one-third. 



Table giving the Number of Minutes after Greenwich Mean Noon when it is Local Apparent Noon 



at Ben Nevis at Different Dates. 



Date. 



Minutes. 



Date. 



Minutes. 



Date. 



Minutes. 



Date. 



Minutes. 



Jan. 1 



24 



Mar. 30 



24 



Aug. 18 



24 



Nov. 2 



3 7 



„ 3 



25 



April 4 



23 



„ 24 



23 



„ 9 



4 



„ 5 



26 



» 7 



22 



„ 27 



22 



„ 17 



5 



„ 7 



27 



„ 10 



21 



„ 30 



21 



„ 21 



6 



„ 9 



28 



„ 15 



20 



Sept. 1 



20 



„ 26 



7 



„ 12 



29 



„ 18 



19 



» 4 



19 



„ 28 



8 



„ 15 



30 



., 24 



18 



„ 7 



18 



„ 30 



9 



„ 20 



31 



» 30 



17 



„ 9 



17 



Dec. 2 



10 



„ 24 



32 



May 15 



16 



„ 12 



16 



„ 4 



11 



„ 29 



33 



„ 25 



17 



„ 15 



15 



„ 7 



12 



Feb. 1 



34 



June 3 



18 



„ 17 



14 



„ io 



13 



„ 11 



345 



„ 9 



19 



„ 20 



13 



., 12 



14 



„ 19 



34 



„ 15 



20 



„ 22 



12 



» 14 



15 



„ 27 



33 



„ 21 



21 



„ 25 



11 



„ 16 



16 



Mar. 2 



32 



„ 25 



22 



„ 30 



10 



„ 18 



17 



„ 7 



31 



„ 30 



23 



Oct. 3 



9 



,, 21 



18 



„ io 



30 



July 2 



24 



„ 5 



8 



„ 23 



19 



„ 15 



29 



„ 12 



25 



., 11 



7 



„ 24 



20 



„ 17 



28 



„ 18 



26 



„ 13 



6 



„ 26 



21 



„ 20 



27 



Aug. 1 



26 



„ 19 



5 



» 28 



22 



„ 25 



26 



„ 12 



25 



„ 27 



4 



„ 30 



23 



„ 28 



25 















