BEN NEVIS OBSERVATORY. 



499 



TABLE XX.— MEAN NUMBER OF TIMES THE SUMMIT WAS CLEAR OF FOG OR MIST 



FOR THE 20 YEARS, 1884-1908. 





Mid- 

 night. 



1 



2 



3 



4 



5 6 



7 



8 



9 



10 



li 



12 



13 



14 



15 16 



17 



18 



19 



20 



21 



22 



23 



Mid- 

 night. 



Mean. 



January . 



7 



6 



6 



6 



6 



6 6 



6 



7 



7 



7 



7 



7 



7 



8 



7 6 





7 



6 



6 



6 



7 



7 





7 



Februaiy . 



8 



8 



i 



8 



8 



7 8 



8 



7 



8 



9 



9 



8 



8 



8 



8 8 





8 



8 



8 



8 



8 



7 





8 



March 



8 



8 



8 



8 



8 



9 8 



9 



9 



8 



9 



9 



9 



9 



9 



9 9 



10 



10 



9 



8 



8 



8 



8 



8 



9 



April 



11 



11 



11 



11 



11 



12 , 12 



12 



11 



11 



11 



12 



12 



13 



13 



13 13 



13 



12 



12 



12 



12 



11 



11 



11 



12 



May 

 June 



14 



13 



13 



13 



13 



13 



1 12 



12 



! 12 



12 



14 



15 



16 



16 



16 



16 15 



15 



15 



14 



14 



14 



13 



13 



14 



14 



13 



14 



14 



13 



13 



13 



12 



13 



13 



13 



13 



14 



14 



15 



15 



15 



15 



15 



16 



15 



15 



14 



14 



13 



13 



14 



July 



August 



11 



11 



11 



11 



10 



10 



10 



10 



I io 



10 



11 



12 



12 



12 12 



13 



12 



12 



12 



11 



12 



11 



11 



12 



11 



11 



9 



9 



9 





9 



y 



8 



8 



[ 8 



9 



9 



10 



10 



10 10 



10 



10 



10 



10 



9 



9 



9 



9 



10 



9 



9 



September. 



9 



8 



8 



9 



9 



9 



9 



9 



1 8 



9 



9 



9 



10 



10 10 



10 



10 



9 



9 



9 



9 



9 



9 



9 



9 



9 



October . 



8 



8 



8 



8 



8 



9 



8 



8 



8 



8 



8 



9 



8 



8 8 



8 



9 



Q 



8 



8 



8 



8 



8 



8 



8 



8 



November. 



7 



/ 



7 



7 



7 



7 



7 



7 



7 



7 



7 



7 



6 



6 7 



7 





7 



7 



7 



7 



7 



7 



fi 



7 



7 



December. 



6 



6 



6 



6 



6 



6 



7 



6 



7 



7 



7 



7 



7 



7, 7 



7 



7 



7 



6 



7 



6 



6 



6 



6 



6 



6 



Year 



111 



109 



109 



109 



108 



110 



107 



108 



107 



109 



114 



120 



119 



121 123 



123 



121 



121 



120 



115 



114 



112 



111 



110 



110 



114 



SUMMIT CLEAR— PERCENTAGE VALUES. 





Mid- 

 night. 



1 



2 



3 



4 



5 



6 



19 



7 

 20 



8 

 21 



9 

 23 



10 

 22 



11 

 24 



12 

 23 



13 



14 



15 



16 



17 



18 



19 



20 



21 



22 



23 



Mid- 

 night. 



Mean. 



January . 



21 



20 



20 



20 



19 



19 



23 



25 



23 



22 



23 



22 



20 



20 



21 



23 



23 



21 



22 



February . 



27 



28 



26 



27 



27 



26 



27 



27 



25 



28 



30 



32 



28 



28 



27 



28 



27 



26 



28 



28 



28 



28 



27 



26 



26 



27 



March 



26 



2/ 



26 



2V 



tl 



28 



27 



30 



29 



27 



28 



29 



30 



29 



29 



30 



29 



31 



31 



30 



26 



26 



26 



27 



26 



28 



April 



36 



36 



35 



36 



36 



38 



3S 



39 



37 



36 



36 



39 



41 



43 



44 



43 



43 



42 



40 



39 



39 



39 



36 



36 



36 



39 



May 



45 



42 



41 



41 



40 



40 



38 



40 



40 



40 



44 



47 



52 



52 



52 



52 



50 



49 



50 



46 



44 



44 



41 



42 



45 



45 



June 



44 



4b 



4b 



44 



43 



43 



42 



43 



43 



43 



44 



44 



48 



49 



52 



52 



50 



51 



52 



50 



50 



46 



46 



44 



45 



46 



July 



35 



35 



37 



36 



33 



33 32 



33 



34 



32 



35 



37 



39 



40 



39 



41 



40 



38 



39 



37 



37 



37 



35 



37 



35 



36 



August 



29 



30 



30 



29 



28 



28 26 



27 



27 



28 



29 



31 



32 



31 



32 



32 



32 



32 



32 



29 



29 



30 



30 



31 



29 



30 



September. 



30 



3U 



28 



29 



29 



28 



29 



30 



30 



29 



29 



31 



32 



32 



34 



34 



34 



31 



32 



31 



31 



30 



29 



30 



30 



30 



October . 



26 



26 



27 



27 



26 



28 



27 



26 



27 



27 



26 



28 



26 



27 



26 



27 



28 



27 



27 



26 



26 



26 



26 



27 



26 



27 



November. 



22 



21 



22 



21 



23 



22 



22 



23 



23 



23 



21 



22 



20 



20 



?A 



22 



21 



21 



23 



24 



22 



21 



23 



21 



21 



22 



December . 



19 



18 



20 



21 



20 



20 



21 



20 



23 



22 



22 



21 



22 



21 



22 



22 



22 



22 



21 



21 



21 



20 



20 



19 



19 



21 



Year 



30 



30 



30 



30 



29 



29 



29 



30 



30 



30 



31 



32 



33 



33 



34 



34 



33 



33 



33 



32 



31 



31 



30 



30 



30 



31 



SUMMIT CLEAR— PERCENTAGE DEPARTURES. 





1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 

 3 



15 

 1 



16 

 



17 

 1 



18 

 



19 



2 



20 



2 



21 



7 



22 



23 



Mid- 

 night. 



Mean. 



January 



2 



2 



2 



3 



3 



3 



2 



1 



1 







2 



1 



1 



1 



1 



1 



22 



February 



1 



1 







V 



1 











2 



1 



3 



5 



1 



1 



n 



1 



n 



1 



1 



1 



1 



1 







7 



1 



27 



March 



1 



a 



1 



1 







1 



2 



1 



1 



1 



2 



1 



l 



2 



l 



3 



3 



2 



2 



2 



2 



1 



2 



28 



April 



3 



4 



3 



3 



1 



1 







2 



3 



3 



2 



4 



5 



4 



4 



3 



1 



n 











3 



3 



3 



39 



May 



3 



4 



4 



6 



h 



7 



5 



5 



5 



1 2 



7 



7 



7 



7 



5 



4 



5 



i 



1 



1 



4 



3 







45 



June 



1 







2 



3 



3 



4 



3 



3 



3 2 



2 



2 



3 



6 



6 



4 



5 



6 



4 



4 











2 



1 



46 



July 



1 



1 







3 



3 



4 



3 



2 



4 



1 



1 



3 



4 



3 



5 



4 



2 



3 



1 



1 



1 



1 



1 



1 



36 



August 











1 



2 



2 



4 



3 



3 



2 



1 



1 



2 



1 



2 



?, 



2 



2 



2 



7 



1 











1 



1 



30 



September . 







2 



1 



1 



* 



l 











1 



1 



1 



2 



2 



4 



4 



4 



1 



2 



1 



1 







1 











30 



; October 



1 











1 



1 







1 











1 



1 



1 







1 



n 



1 



n 







7 



1 



1 



1 







1 



27 



i November . 



1 







1 



1 











1 



1 



1 



1 







2 



2 











J 



/ 



1 



?, 



n 



1 



1 



1 



1 



22 



, December 



3 



1 



u 



1 



1 | 







1 



2 



1 



1 







1 







1 



l 



1 



l 















1 



1 



2 



2 



21 



Year 



1 



1 



1 



2 



2 



1 



2 



1 



1 



1 







1 



2 



2 



3 



3 



2 



2 



2 



1 







I 







1 



1 



1 



1 



31 



















































