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BEN NEVIS OBSERVATORY. — LOG-BOOK. 



[1898. 



July 2. — St. Elmo's Eire heard at 8 h and 22 h on 

 kitchen chimney and on instruments on top of Tower. 

 Thunder heard at 8 h 15 m . 



July 3. — Temperature below freezing point most of 

 the day. The hill-top has a fresh covering of snow from 

 3 to 4 inches deep. 



July 4. — Lunar halo seen at midnight. 



July 7. — Mist till noon; clear at times till 21 h , when 

 the clouds sank below the level of the summit, leaving 

 the sky cloudless and the air dry and clear but cold. 



July 8. — Summit clear, sky almost cloudless, and air 

 dry all day. The shadow of the Ben was very marked 

 from sunrise (3 h 35 m , G.M.T.) till 4". Detached cum- 

 fog in valleys in morning, but no fog below at night. 



July 9. — Sky somewhat cloudy till 19 h , but weather 

 line, warm, and very clear all day, the visibility being 5 

 from dawn till dark. Shadow of the Ben very distinct 

 both at sunrise and sunset. The air was abnormally 

 dry (for July) in the early morning, and the following 

 extra readings were taken : — 



5hi0mD.B. 44-8 

 W.B. 31-3 



5>> 20 ra D.B. 45-2 

 W.B. 31-4 



5>>30 m D.B. 45-8 

 W.B. 31-1 



5 h 40 m D.B. 45-8 

 W.B. 32-1 



The lowest humidity observed (23%) was at 9 h . Solar 

 halo at 6 h , 7 h , 8 h . All morning the motion of the upper 

 cloud (cir.-s.) was directly opposite to that of the wind 

 on the summit. 



July 10. — .Another fine, warm, and exceptionally clear 

 day. A good deal of cumulus all day till 17 h , when it 

 enveloped the summit; but from 18 h onwards it lay in 

 a thick sheet very little below the level of the hill-top. 



July 11. — Thick fog almost on a level with or passing 

 over summit all day. Glories and fogbows were frequent 

 before noon. 



July 14. — Fog at 3 h , and again from 9 U to 17 h ; there- 

 after cloudless. Large and sudden changes in the 

 relative humidity at various times. Fogbow and corona 

 at 17 h 40 m . Glory at 20 h . Spider seen in kitchen at 15 h . 



July 15. — Sky cloudless, with fog below till 9 h ; 

 overcast, though fog still below at 10 b , ll h , 12 h ; after 

 that fog or mist very thick at times. 



July 19. — Raven heard at Bucket Stage at 20 h . 



July 20.— Thin fog at 3 h , 4 h , and 9 h ; otherwise 

 almost cloudless. Hoar-frost, glories, fogbows and coronse 

 in early morning. Visibility 5 from noon till 22 h . 

 Earth shadow seen after sunset. Snow-bunting heard 

 singing very sweetly at various times during last 3 days. 



July 25. — Solar corona at 4 h 10 m . Fog below till 

 10 h , passing over summit at ll h and 12 h , and rising there- 

 after. A young snow-bunting which the cat brought in 

 yesterday alive but injured died this afternoon. 



July 27. — Sky almost cloudless till 6 h ; thin fog or 

 cloudy sky thereafter. Thick haze all round below in 

 early morning. 



July 29. — Summit clear after 6 h , but sky cloudy 

 during the rest of the day. Fog in valleys, and at times 

 rising up and passing over Ben Nevis. 



July 30. — Sky pretty clear till 18 h . Mist with 

 drizzling rain since. Fog in valleys most of the day. 

 Glories seen at 5 h , and a solar halo at 6 h . 



Aug. 6. — -Lunar halo seen at 22 h . Hoar-frost on roof 

 of Observatory at midnight. 



Aug. 7. — Lunar halo seen at 2 h . 



Aug. 9. — Sky almost cloudless till 12 h , but overcast 

 thereafter with cirro-str. Fog in valleys all day, and 

 rising above summit in afternoon. Fog on at midnight. 

 Lunar halo at l h . Solar halo at 8 h and 9 h . Hoar-frost 

 on roof of Observatory in early morning. 



Aug. 11.— Solar halo at 18 h . 



Aug. 12. — Slight haze in afternoon. Shadow of Ben 

 Nevis seen at 4 h . 



Aug. 15. — Sky cloudless till 3 h ; somewhat cloudy the 

 rest of the day. Earth shadow and Ben Nevis shadow 

 seen at sunrise. 



Aug. 16. — Sky overcast or nearly so till 21 h ; cloud- 

 less since. Fog hanging about the valleys most of the day. 

 Aurora seen at 22 h 23 m . A sheep seen at first gorge at 7 h . 



Aug. 17. — Cloudless sky till 7 h . Cloudy or fog on 

 summit till 21 h ; cloudless again since. Fog in valleys 

 all day, and rising about noon above the summit. Slight 

 haze in distance all day. Aurora seen at l h and 2 h , and 

 shooting stars at l h . Hoar-frost on office roof in early 

 morning. Earth shadow and Ben Nevis shadow seen at 

 sunrise. 



Sept. 4. — Sky cloudless except for a little cirro-cum. in 

 early morning and again in the evening. This has been 

 the wannest day this year as yet : the temperature 

 ranging from 50°"0 to 62°*1, and the air very dry ; humidity 

 from 40 to 61. Detached fog in valleys in early morning, 

 but dispersing during forenoon. 



Sept. 8. — Three snow-buntings seen on Bucket Stage. 

 9. — Mist or overcast sky with showers of rain. 

 10. — Occasional showers of rain during the day. 

 11. — Mist all day with heavy rain in the after- 

 Stars gleaming at l h . 

 12. — Sparrow seen on office roof. 

 16. — Mist till ll h ; sky almost cloudless since, 

 but thick haze below all round. Light variable winds all 

 day, chiefly S. Aurora seen at 21 h . 



Sept. 17.— Sky cloudless till 4 h . Cloudy till 15 h ; mist 

 since. Thick haze below. Aurora seeu from l h to 3 h , and 

 zodiacal light at 4 h . 



Sept. 22. — Sky almost cloudless all day. Fog in 

 valleys in forenoon, but clearing away during the after- 

 noon. Slight haze in distance. Faint aurora seen from 

 21 h to midnight. 



Sept. 23. — Aurora seen from l 1 ' to 4 h and a solar halo 

 at 12 h and 13 h . 



Sept. 24. — Sky perfectly cloudless all day. Fog in 

 valleys during the day, but clearing away towards evening. 

 Aurora seen at 2 h and 3 h and again at 22 h , 23 h , and mid- 

 night. Haze in valleys all day. 



Sept. 25. — Fog and haze in valleys all day. Aurora 

 seen at 1\ 2 h , 3 h , and 4 h . 



Sept. 26. — Fog and haze in valleys most of the day. 

 Since 22 h summit has been enveloped in fog, but wit! 

 moon gleaming at times. 



Sept. 28. — A brilliant display of St. Elmo's Fire seer 

 at 3 h and 4 h on instruments on roof of Tower, kitcher 

 chimney, thermometer ladders, and Snow Post. The 

 Hotel chimney could be seen distinctly all aglow from 

 Observatory roof, also jets of flame shot out from a sheet 

 of corrugated iron which was lying flat on ground half- 

 way between Motel and Observatory. 



Oct. 3. — Mist at l h ; summit clear and sky perfectly 



Sept. 

 Sept. 

 Sept. 

 noon. 

 Sept. 

 Sept. 



