

BEN NEVIS OBSERVATORY. — LOG-BOOK. 



[1899. 



Sept. 29.— Lunar coranse seen at 3 h and 4 U , and light- 



ning between 20 h and 21 h . A llockof buntings seen at 18 h . 



7. Mist and drizzle till 16 1 '. Clear and almost 



cloudless till 23 h , but oum.-fog below all round, fog at 



times passing it. 



(;,-/. 14 — Detached fog iu various directions below the 

 level of summit till 19 h . Lunar corona seen at 22\ 



Oct. 15. — Thick haze came on below level of summit 

 after 9' 1- An aurora, faint and low down, seen at l 1 ' and 

 •J 1 '. 



Oct. 19. — Small amounts of cirrus on sky till 17 h . 

 Cloudless thereafter. Pretty thick haze in the valleys all 

 day. A raven was seen flying over summit about 15 h . 



Oct. 20. — Summit clear all day, except for thin fog 

 passing about the middle of the day. After 18 h there was 

 continuous fog all round below to about 3000 feet. Thin 

 fog at times passed overhead, on which lunar coronas were 

 seen at 20'' and 21 h . A lunar fog-bow was noted at 20\ 



Oct. 21. — Detached fog below all morning, dispersing 

 in afternoon, giving place to very thick haze which at 

 night limited the "visibility" to 1. Various amounts of 

 cirrus on sky all day, on which a lunar halo was seen at 

 midnight. A lunar corona was seen at l h . 



Oct. 22. — Air clear and dry till ll h , but thick haze all 

 round below. Fog was observed forming and advanc- 

 ing to westward of Ben at 8 h . At noon it reached 

 summit and remained thereon for the rest of the day. 

 Lunar halos were seen at 2 h and 3 h . 



(J< t. 23. — Lunar corona and fog-bow seen at 23 h . 



Oct. 24. — Fog till 6 h . Mostly clear with some cirrus 

 on sky till 18 h . Cloudless at 19'' and 20 h . But at 21 h 

 a thick pall of stratus covered the sky and descended to 

 summit, with a rise in temperature and some rain at 23 h 

 and midnight. Lunar corouae seen at l h and 2 h . 



Oct. 30. — Thunder was heard at 1 3 h 45 m , and at the 

 same time there was a strong current on wire. Lightning 

 was seen at 20 h , 21 h , 22 h , and 22 h 35 m . St Elmo's Fire 

 was seen at 22 h and 23 h ; and at midnight there was a 

 strong ring on telephone bell. 



Nov. 4. — A glory was seen at 8 h . 



Nov. 5. — Telephone bell frequently ringing by earth 

 currents. 



Nov. 6. — St Elmo's Fire was heard at 10 h . 



Nov. 7. — A few rings on telephone by earth currents 

 during the day. 



Nov. 8. — St Elmo's Fire was seen at 6 h . Raven seen at 8 1 '. 



Nov. 9. — Lunar halo seen at 20 1 '. Snow-bunting seen 

 at 15 1 '. 



Nov. 10. — Stormy all morning. From 3 h till 7 h in- 

 clusive, the thermometer in tower was used. Readings 

 corrected (-0" - 3) — double readings being made till 13 h . 

 St Elmo's Fire was seen at 22 h . 



Nov. 1 1 . — St Elmo's Fire was seen at 5 1 '. 



Nov. 14. — Mist and rain in early morning. Fog and 

 snow about mid-day. Clearing in evening. Cloudless 

 and air dry at night. A watch was kept for the Leonid 

 meteors to-night, but none were seen. 



Nov. 1.").— Cloudless till 8 h , and cloudy with cirrus till 

 18 1 '. Thereafter a thick bank of high cumulus and haze 

 came up from S.W. This thickened and fell to summit 

 by 22\ and formed thick fog or mist till midnight. The 

 humidity at 2 1 ' and 3 h was 28 and 29 per cent., but it 

 quickly rose thereafter. 



and fog below 

 "Winter ther- 



Nov. 17. — Fog all day, sinking at night, leaving the hill- 

 top alone clear, and forming a continuous sheet all round. 

 The air was dry at 22 h , but immediately after the obser- 

 vation the top of the fog rose and was passing, and the air 

 became saturated — the dry bulb at the same time falling 

 to the temperature of the wet bulb. Bright lunar corona? 

 seen at 21 h , 22 h , 23 h , and midnight. 



Nov. 18. — Summit clear most of the forenoon, but 

 thick continuous fog on all hills below 4000 feet. Bright 

 lunar corona? seen on thin passing fog at l h and 2 h . 

 At 2 h there were three sets of rings, the colours being 

 very distinct, as follows : Moon, white, R.b.g.y, red (others 

 only flashing at times) — measurement per stephanome of 

 first red gave rad. 2° 36'. 



Nov. 20. — Snow-buntings seen at 17 h . 



Nov. 23 to 28. — Mist, high temperature, and heavy 

 rain on these six days. On the 26th, the daily total 

 rainfall was 4325 inches. The hourly falls at 13 h and 

 14 h being respectively, 0"783 inch and - 983 inch. The 

 latter amount is the greatest measurement of rain (not 

 snow) on record here. 



Dec. 2. — Three ravens were seen at 12 h . 



Dec. 9. — Summit clear from 5 h till ll h 

 all round. Lunar coronas seen at 17 h . 

 mometer box put out on ladder No. 2 at 8 h, 15 m . 



Dec. 10. — Summit clear after 14V but fog below all 

 round and at times passing over summit in afternoon. 

 Haze in distance. Lunar corona? seen at 19 h . and lunar 

 halo at 20 h , 21 h , and 22 h . 



Dec. 12. — Fog till 8 h , clear since. Slight haze and fog 

 in valleys most of the day. Lunar halo seen from 18 h till 

 midnight. 



Dec. 13. — Summit clear till 5 h , but almost continuous 

 fog since. Lunar halo seen at l h , 2 h , and 3 h . 



Dec. 14. — Slight haze in valleys in forenoon, Lunar 

 corona? seen at 17 h . 



Dec. 17. — Summit clear at times during the day, and 

 sky apparently cloudless. Fog in valleys all round to 

 fully 4000 feet, on which glories were seen at 14 h . Lunar 

 corona? seen at I7 h and I9 h ' 



Dec. 18. — Thermometer box changed at ll h 15 m . 



Dec. 20. — Summit cleared after 13 h . Fog and haze in 

 valleys all afternoon. Thermometer box changed at 1 5 h 10 m . 



Dec. 21. — Fog in valleys all morning, rising and 

 enveloping summit at 6 h . 



Dec. 22. — Fog till 12 h , cloudless or almost so since. 

 Fog in valleys all afternoon to about 3000 feet. Glories 

 seen at 14 h . 



Dec. 23. — Lunar halo seen at 2 h . 



Dec. 24. — Sky cloudless at 2 h , but thick fog on hills 

 all round. Fog during the rest of the day. Thermometer 

 box changed at 2 h 10 m . 



Dec. 26. — Summit clear frequently during the day, and 

 sky cloudless. Fog in valleys all day. Lunar corona? 

 seen at 6 h and 7 h . Thermometer box changed at 9 h 10 m . 



Dec. 27.- — Sky cloudless most of the day, but fog in 

 valleys, which has been continually passing over hilltop all 

 the afternoon. Glories seen at 14 h and 15 h . 



Dec. 28. — Although sky was cloudless most of the 

 forenoon, fog has been almost continually passing over 

 summit, finally settling on hilltop after 13 h . 



Dec. 30. — Thermometer box changed at 20 h 15 m , and 

 put up a step on the ladder. 



