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BEN NEVIS OBSERVATORY-LOG-BOOK, 1895. 



Jan. 3.— Thermometer box shifted at 13 h 10 m . Height 

 above snow not altered. 



Jan. 4. — Thermometer box shifted at 10 h 15 m . Height 

 above snow not altered. The summit was clear frequently 

 to-day, but there was always fog either blowing over or 

 near at hand till 17 h , after which there was no fog below, 

 but sky gradually clouded over and at 23 h settled down 

 to fog on summit. 



Jan. 5. — At 2 h the temperature was 20°T, but there was 

 distinct wet mist on summit. 



Jan. 7. — Very strong N. or N.E. squalls all morning. 

 Little or no snow fell apparently after 3 h , but the drift con- 

 sisted of lumps of the icy surface as well as the finer particles. 

 At 8 h it was noticed that the north window in top flat of 

 tower was broken, probably by one of the pieces of hard 

 snow. The Tower Screen was in use till 7 h , a correction of 

 -f OT was applied to its readings, that being the average 

 difference between it and the Stevenson Screen for a few 

 hours before and after. About 6 h it was noticed that the 

 pumping of the barometer exceeded 0"200 inch. Towards 

 evening the fog got thinner and sky was cloudless. Lunar 

 corona at 20 h and 22 h . 



J an% 8.— Thermometer box shifted at h 20 m . Height 

 above snow not altered. Sky cloudless all day, but haze 

 and low stratus seen at times at the western horizon. Fog 

 lying in Loch Lochy at 4 h and in valleys to eastward from 

 8 h to 13 h ; after that no fog below, except a little on Moor 

 of Rannoch about 20 h . 



Jan. 10. — Lunar halo seen at 3 h . When top was clear 

 it was noticed that thick haze filled the valleys and ex- 

 tended above the hills all round, restricting the visibility. 



Jan. 12. — As long as the top remained clear thick haze 

 was seen in the valleys ; the fog that came on formed on 

 the summit; it did not rise from a lower cloud layer. 

 After 12 h the Tower Screen was used, as the high wind 

 made it dangerous to go to the Stevenson. A correction of 

 — 0'2 was applied to the Tower Screen readings, that being 

 the average difference between the Tower Screen and the 

 Stevenson in the forenoon. 



Jan. 13. — The high wind made it necessary to use the 

 Tower Screen except from 9 h to 13 h , when duplicate 

 readings were taken, and after 21 h when the wind 

 moderated. A correction of — - 4 was applied to the Tower 

 Screen readings, that being the mean difference when 

 double readings were got in the forenoon and at night. 

 A little snow fell in the forenoon, but no gauges were out. 



Jan. 14.— No rain-gauges were out to-day owing to the 

 high wind and drift. Very thick fog all afternoon, forming 

 massive fog-crystals everywhere. 



Jan. 15. — After the summit cleared at 8 h fog lay on the 

 hills round for a few hours, but gradually broke up and 



was found under-cut 



was put out the rest 



About 6 inches was 



dispersed in the middle of the day, gathering again towards 

 evening. It was thickest on the hills to eastward. Ther- 

 mometer box shifted at ll h 15 m . Height above snow not 

 altered. 



Jan. 17.— At 5 h , 7 h , 8 b , and from ll 11 to 14 h , the fog 

 sank below summit but hid all the hills round. The sky 

 was partly covered with cirro-stratus ; a lunar halo was seen 

 at 5 h , and at ll h , 12 h and 13 h a solar halo. The snow 

 that fell in morning was very light and soft. Thermometer 

 box shifted at 8 h 15 m . Height above snow not altered. 



Jan. 19. — Thermometer box shifted at 4 h 25 m . 

 Height above snow not altered. 



Jan. 22.— Thermometer box shifted at 9 h 15 m . 

 Height above snow not altered. 



Jan. 23. — When the top cleared to-day, it did so by 

 the fog lifting and forming clouds above. There was then 

 no fog below. 



Jan. 24. — At 17 h the rain-gauge 

 and lying on one side. No gairge 

 of the day, as there was great drift 

 cleared off the hill-top in the course of the evening. At 

 19 h and 20 h the Tower Screen was used. A correction of 

 — - 9 was applied to its readings. 



Jan. 26. — At 10 h a solar fog-bow and some double 

 glories were seen. Thermometer box shifted at ll h 10 m . 

 Height above snow not altered. 



Jan, 28. — Up to 6 h the sky was clear but fog blowing 

 over the top. From 8 h to 13 h there was fog on Lochiel 

 and Loch Lochy • this was the only fog below. After 9 h 

 the sky was covered with cirro-stratus, which gradually 

 sank down. By 17 h it was touching the hill- tops to 

 W.S.W., and after 19 b was on Ben Nevis. Faint solar 

 halo at 12 h . Thermometer box shifted at 7 h 10 m . 

 Height above snow not altered. 



Jan. 29. — Thermometer box shifted at 13 h 10 m . 

 Height above snow not altered. 



Jan. 31. — No low fog in early morning, but from 7 h 

 to ll h fog lay over Loch Lochy and sometimes on 

 Lochiel. Loose cum. fog was on the hill-tops most of 

 the day, but no continuous sheets of fog. Thermometer 

 box shifted at 7 h 15 m . Height above snow not altered. 



Feb. 4.— Thermometer box shifted at h 20 m . Height 

 above snow not altered. 



Feb. 5. — At 6 h an aurora, single arch with streamers, 

 was seen. It could not be very well made out owing to 

 the passing fog on summit. 



Feb. 6. — Though the sky was almost cloudless from 

 5 h to ll' 1 there was always fog blowing over the hill-top. 

 At ll 1 ' thick fog lay on the hills to E., and by 12 h it 

 covered Ben Nevis also, the wind at the same time 

 shifting from light N. to strong E.S.E. Thermometer 



