THE METEOROLOGY OF GLEN NEVIS 



639 



Table II. — Showing the Departure from the Average of Mean Values at the Ben Nevis and 

 Fort-William Observatories for the Tliirteen Years 1891-1903. 



Ben Nevis. 





Pressure. 



Tem- 

 perature. 



Sun- 

 shine. 



Cloud.* 



Wind 

 Force.* 



Rain. 



Wind Direction.* 



N. 



N.E. 



E. 



S.E. 



S. 



S.W. 



W. 



N.W. 



Calm. 



1901. 

 October 

 November . 

 December . 



1902. 

 January 

 February . 



Inches. 

 + •019 

 + •184 

 -'200 



+ •092 

 -•029 



-0-5 

 -1-1 

 -2-5 



+ 0-6 

 -20 



% 

 -10 

 + 6 

 



+ 6 



+ 8 



% 

 + 0-4 

 -0-5 

 + 0-2 



-0-3 

 -0-7 



+ 0-11 

 -071 

 -0-58 



-0-90 

 + 0-03 



Inches. 

 + 4-74 

 - 0-86 

 + i-20 



+ 5-73 

 -11-72 



% 

 + 32 

 - 5 

 + 20 



+ 13 

 -78 



% 



-11 

 + 20 

 + 20 



+ 12 

 - 3 



% 

 -1 



+ 7 

 + 1 



-3 



+ 6 



% 

 -4 

 -4 

 -1 



-4 

 -1 



% 

 + 7 



- 7 



- 7 



- 3 



+ 13 



% 



+ 5 

 -4 

 -7 



-6 



+ 4 



% 



+ 6 

 -7 

 -5 



-2 



-4 



% 



+ 2 

 -4 

 -3 



+ 3 

 -6 



% 

 -1 



+ 2 

 + 1 



+ 3 



-8 



% 

 -3 

 -3 



+ 1 





 -1 











Fort-William. 





C 



r 

 j 



B 





Pressure. 



Temperature. 



Sunshine. 



Rain. 







1901. 

 ctober . 

 ovember 

 )ecember 



1902. 

 anuary . 

 ebruary 



Inches. 

 + •016 

 + •220 

 -•216 



+ •099 

 -•014 



-0 ! 1 

 -12 

 -2-2 



-O'l 



-2-8 



% 



- 1 

 + 11 

 + 3 



+ 8 

 + 12 



Inches. 

 + 1-63 

 -2-86 

 -0-63 



+ 1-35 

 -5-80 



% 

 + 21 

 -38 

 - 6 



+ 13 



-84 











* The averages with which cloud amount and wind direction and force have been compared are for the twenty 

 years 1884-1903. See Trans. R.S.E., vol. xliii. pp. 497-501. 



Daily Temperature Differences betiveen Achariach and Fort- William, 

 and Achariach and Ben Nevis. 



Table III. gives the mean daily temperature at Achariach for each day in the five 

 months, deduced from the tabulation of the hourly thermograph values controlled by 

 eye-readings taken several times daily. On comparing these values with Fort- William, 

 we get the following results : — 



Number of Days on which Achariach ivas from 



8T to 10-0 colder than Fort- William 









1 



6*1 „ 8-0 „ „ „ 









1 



4-1 „ 6-0 „ 









2 



2T „ 4-0 „ 









17 



0-1 „ 2-0 „ 









38 



The same as ,, 













0*1 to 2'0 warmer ,, ., 









77 



2T „ 4-0 „ 









10 



4-1 „ 6-0 









3 



