96 



BEN NEVIS OBSERVATORY. — LOG-BOOK. 



[1893, 



to and including midnight the large screen readings were 

 entered on daily sheet, after that the small. 



Sejrt. 25.— Thermometer box shifted at 14 h 8 m . 

 Height not altered. Top clear after 7 h . Clear views all 

 round. Rum, Skye, Mull seen. No fog below, except 

 some on hills to E. after 18 h . 



Sept. 26. — Fog on or passing all day, but sky apparently 

 clear above. Fog very thick in afternoon. During a 

 short clear spell at 22 h a lunar halo was seen. 



Oct. 3.— Thermometer box shifted at ll h 10 m . Height 

 not altered. Top clear in afternoon. No fog below, but 

 haze to S. ; after 18 h patches of fog on hills to S. and E., 

 and occasionally on Ben Nevis also. 



Oct. 4. — Fog lay among hills to E. till 10 h . Sky clear, 

 but fog or scud on or near the top all day. Faint aurora 

 seen at midnight. 



Oct. 7. — Thin fog with frequent clearances most of the 

 day. Up to 4 h heavy fog lay in valleys to N., and after 

 that was in valleys all round or passing over the summit 

 till 14 h . After 15 h there was no low fog, except some 

 patches to N.E. at 17 h . 



Oct. 8. — Sky clear in early morning, overcast by 5 h , fog 

 passing at 6 h , and snow falling at 7 h . The snow which 

 fell was in large flakes and soft, it did not drift, but 

 lay 6 or 8 inches deep. Top and sky clear again after 

 20 h , but fog rising and passing over Ben at times. 

 Thermometer box shifted at 20 h 12 m . Height not 

 altered. 



Oct. 15. — At 23 h 10 m , fresh dry and wet put out. 

 Box and minimum not altered. The snow which fell a 

 few days ago is now very much melted off, there being 

 only a few patches more than 6 inches deep. 



Oct. 16.— At l h 10 m , fresh dry and wet put out. Box 

 and minimum not altered. 



Oct. 17. — Summit dear after 18 h , and sky almost 

 cloudless the rest of the evening, and air pretty dry after 

 22 h . Cumulus above horizon all round, and a little 

 detached fog in valleys to S. A portion of an aurora seen 

 at 21 h , with faint streamers. 



Oct. 23. — Summit clear for a few hours in forenoon, 

 but sky overcast with cum.-s. Thermometer box shifted 

 at 10 h 10 m in small box on ladder stand No. 2. 

 Barometer fell -084 between 22 h and 23 h , and at the same 

 time the wind was blowing in strong gusts from S.W. 

 At midnight, barometer had risen again - 045, but 

 continued falling thereafter. 



Oct. 25.— Strong, gusty S.W. winds till 4 h , moderating 

 in force during the forenoon. Very heavy rain fell 

 till 7 h , and heavy showers of hail and snow the rest 

 of the day. The usual hissing noise which accom- 

 panies St. Elmo's Fire was heard at 22 h and 23 h , 

 but, being bright moonlight, the discharge could not 

 be seen. 



Oct. 26. — Summit clear after 22 h , except for a little 

 fog blowing over hill top ; but sky overcast with cum.-s. 

 and having a very ugly appearance generally. Snow fall- 

 ing almost all day, and a good deal of drift flying about 

 in ihe afternoon. 



Oct. 30.— Fog till 4 h , sky cloudy till Q\ and thin fog 

 passing; almost cloudless till 9 h , and fog off and on till 

 14 h ; continuous fog the rest of the day, with slight 

 showers of snow in the evening. Thermometer box 

 shifted at 7 1 ' 10'". Height not altered. 



Oct. 31. — Summit clear occasionally at 9 h and 13 h , 

 but sky cloudy. A fog-bow was seen at 13 h . 



Nov. 4. — Fog or overcast sky till 15 h , almost cloudless 

 till 18 h , except for a little cirrus ; no fog on hills below. 

 Air very clear to W. and S.W. Visibility about 4. Fog 

 on again after 18 h . Thermometer box shifted at ll h 10™. 

 Height not altered. 



Nov. 6. — Fog cleiring off summit at times during the 

 day, but sky cloudy. Thermometer box shifted at 

 20 h 10 m . Height not altered. 



Nov. 8. — Thin fog till 18 h and sun gleaming at times 

 about midday. Sky cloudless till 22 h , but fog over hills 

 to N. and E. Fog came on again at 2o h . Light showers 

 of snow fell between 9 b and 15 h . Aurora seen at 20 h . 

 Thermometer box changed at 19 h 15 m . Height not 

 altered. 



Nov. 9. — Sky perfectly cloudless all day, and fog on 

 hills to E. and S. till 4 h , thereafter spreading all round 

 and rising to height of Ben Nevis, and blowing over 

 summit at times in the afternoon, but in the evening 

 it sunk again to about 3000 feet. Air very clear to W. 

 at 3 h , Fladda, Tobermory and Barra Head lights being 

 seen. Air dry all day, except at 16 h ; humidity was 30 per 

 cent, at 3 h . Aurora seen at l h till 4 h , and at 19 h , 20 h and 

 21 h . Shooting stars at 3 h . A mouse was seen in lobby 

 of visitors' room. 



Nov. 10. — Sky cloudless till 6 h , somewhat cloudy with 

 cirrus till 15 h ; but cloudless again since. Fog on hills all 

 round to 3000 feet; but after 16 h it began to break up 

 into detached cum. fog, and in the evening lay over hills 

 to E. and S. only. Aurora seen at 19 h , and on till mid- 

 night. 



Nov. 11. — Sky cloudless all day, and fog all round to 

 4000 feet. Aurora seen at l h and 20 h . 



Nov. 12. — Sky cloudless all day and fog around to 

 4000 feet ; in the afternoon fog had sunk a little, and 

 some hill tops were seen above fog. Aurora seen till 3 U , 

 and at 22 h and after. 



Nov. 13.- — Temperature fell 7 c- 9 between l h and 2 h , 

 but rose again 4° "7 at 3 h , and remained pretty steady the 

 rest of the day. Air dry all day, humidity ranging from 

 36 to 76 per cent. Sky cloudless all day, and haze at, 

 horizon all round in the, afternoon, thicker to W. and N. 

 Detached fog lying in valleys all day. Aurora seen at 1 L 

 till 4 h , and at 20 h and midnight 



Nov. 14. — Sky cloudless till 4 h , cloudy and fog on 

 summit at times till 13 h , continuous fog thereafter. 

 Detached fog in valleys in early morning, str.-cum. at 

 horizon to S. and W. at 4 U . Air very dry up till 8 h , 

 lowest humidity 27 per cent, at 4 h . Calm till 6 h , and 

 light N. wind during the rest of the day. Aurora seen at 

 l h and 2\ 



Nov. 15. — Summit clear and sky cloudless till 2 h , and 

 some fog in valleys. Fog, with occasional breaks, during 

 the rest of the day. 



Nov. 16. — Thick fog all day, and dark-coloured crystals 

 growing on all exposed objects. 



Nov. 20. — Fog cleared off summit after 10 h , but 

 leaving hills all round enveloped in fog and sky somewhat 

 cloudy, with cirrus till 17 h , but cloudless thereafter. Air 

 very dry at times in the afternoon, humidity being 32 

 per cent, at 20 h . Glories were seen at 14 h and 15 h . 

 Thermometer box changed at ll h 15 m . Height not altered. 



