1903.] 



BEN NEVIS OBSERVATORY. — LOG-BOOK. 



553 



July 22. — Some heavy thunder showers fell in the 

 forenoon, and earth currents in the telegraph cable were 

 noted between 7 h and 9 h . 



July 23. — At 4 h St Elmo's Fire, very strong, was 

 noted. 



July 27. — Throughout the day haze lay in the valleys, 

 and banks of fog hung about the surrounding hills. Till 

 8 h fog lay over Loch Lochy and Loch Laggan. 



July 31. — Glories noted at 20 h , and a lunar halo 

 at 22 b . 



Aug. 3. — St Elmo's Fire seen at 2 h . 



Aug. 11. — Lunar coronae noted at l h and 3 h . 



Aug. 12. — Fog in valleys all round in afternoon. 

 Glories noted at 6 h . 



Aug. 15. — Thunder and lightning almost continuous 

 from 12 h till 17 u , and during this time St Elmo's Fire was 

 very strong. St Elmo's Fire was also seen at 2 h . 



Aug. 17. — After 18 h the hill-top cleared and the air 

 became very clear, several of the "West Coast lights being 

 visible all evening. 



Aug. 18. — A brilliant display of St Elmo's Fire was 

 noted at midnight. Hoar frost on roof at 2 h . 



Aug. 19.— St Elmo's Fire at 4 h and 22 h . Lightning 

 seen at 23 h 20 m . 



Aug. 20.— St Elmo's Fire at l h and 19 h , and thunder 

 and lightning from l h till 3 h . 



Aug. 21. — About 3 inches of snow lay on the ground 

 this morning. St Elmo's Fire seen at midnight. 



Aug. 23. — Fog hanging about hills all round. A 

 rainbow was seen at 17 h and 18 h . 



Aug. 24. — Thick haze in the valleys and fog over the 

 surrounding hills. Thunder was heard between 16 h and 

 17 h . 



Aug. 25. — The sky was absolutely cloudless till 8 h , 

 but haze and fog were in valleys. The fog rose and was 

 passing over the Ben in the afternoon, and finally 

 enveloped the summit after 16 h . Glories seen at 6 h . 



Sept. 2. — St Elmo's Fire seen at midnight. 



Sept. 3. — Lunar corona at 22 h . 



Sept. 10.— St Elmo's Fire seen at 3 h . 



Sept. J 4- — Sky cloudless, or nearly so, all day. Some 

 fog on hills to E. till 7 h , which cleared away after 

 that. 



Sept. 15. — Sky cloudless most of the day, but haze 

 all round. 



Sept. 16. — Sky slightly cloudy all day, with cirro-cum. 

 Fog in valleys to S.E. in early morning, but clearing 

 away towards noon. Haze in distance most of the day. 

 Air very dry at times ; lowest humidity 37 at 9 h . 



Sept. 17. — Fog on hills to E. all morning, but after 9 h 

 it rose up and passed over hill-top frequently till 16 h , 

 when it finally settled on summit. 



Sept. 20.— Sky cloudless till 6 h ; fog till 13 b , clear again 

 since, but fog passing at times. Small part of aurora 

 seen at l h and 2 h . 



Sept. 21. — Mist or cloudy sky till ll h ; cloudless since. 

 Fog on hills to E. all day, and frequently passing over 

 summit. 



Sept. 24. — Mist, with heavy rain, till 3 b . Summit clear 

 and air dry since. A little detached fog on hills to 

 S. and E. most of the day. 



Sept. 25. — Sky cloudless till 5 h , cloudy, with cir.-cum. 

 till 10 h , thin fog or mist since. Haze all round below, and 



fog over Locheil, the Canal, and Loch Lochy in early 

 morning. Dew forming on Observatory roof at 2 h 

 and 3 h . 



Sept. 26. — Thin mist till 5 h ; clear since. Haze and 

 fog on hills below all day. 



Sept. 29. — Mist, with slight showers of drizzle, till 9 h ; 

 clear since, but sky cloudy. Fog on hills to E. all 

 afternoon. 



Oct. 2. — Fog-bow with glories seen at 12 h . 



Oct. 5.— St Elmo's Fire seen at 5\ 



Oct. 6. — Summit clear and air dry at 23 h and mid- 

 night, and detached fog on hills around. 



Oct. 7. — Sky cloudy or overcast till 15 h ; fog since. 

 Air very clear at times in forenoon. On the hills around 

 the snowline is about 3000 feet 



Oct. 10. — Sky almost cloudless till 13 h , somewhat 

 cloudy, with cir. and cir.-s., till 16 h ; fog thereafter. Low 

 lying fog in valleys in early morning, but clearing away 

 during the forenoon. Ascending currents to W. at 13 h . 



Oct. 11. — Fog-crystals forming rapidly in forenoon. 

 Between 5 h aud 15 h these crystals had grown 15 inches on 

 hand-rail of tower. Thermometers changed at 15 h 10 m . 



Oct. 13. — The snow on summit to-day is fully 4 inches 

 deep. Strong earth currents on cable between h 15 m 

 and 2 h . 



Oct. 15. — Exceptionally heavy showers of snow from 

 l h to 16 h . St Elmo's Fire seen at l h , 21 h and 23 b . 

 The depth of snow measured at 15 h at Post A. was 9 

 inches. 



Oct. 16. — Squally N.W. winds, with continuous snow, 

 all day. St Elmo's Fire seen at l h , 2 h and 4 h . Depth 

 of snow at the snow-post increased 3 inches to-day, but 

 round Observatory wreaths have formed 3 to 4 feet deep. 



Oct. 18. — Summit clear and air dry at times between 

 6 h and 16 h , the lowest humidity being 41 at 9 h . Hard 

 packed cir.-s. in forenoon, forming into cum.-s. and 

 nimbus and mist in afternoon. Winter thermomeler box 

 put out on stand No. 2 at 7 1 ' 10 m . 



Oct. 22. — Temperature steady between 29° and 32° all 

 day, but as the observer was going out to the 22 h observa- 

 tion he felt warm puffs of air on face and hands. 



Oct. 23.— Thermometer box changed at 16 h 10 m . 



Oct. 26. — Earth currents on telephone between 18 h and 

 19 h . 



Oct. 27. — Summit clear from 10' Q till 17 h , but almost 

 continuous scud or fog passing. Glories seen at 16 h . 



Oct. 28. — Earth currents in telephone between 8 h and 9 h . 



Oct. 29. — Fog-crystals, grey in colour, forming all day. 



Oct. 31. — Strong earth currents on telephone all day. 

 Glazed frost in the evening. 



Nov. 1. — Summit clear most of the day. Sky slightly 

 cloudy, with cirrus moving from about W. Fog all round 

 below to about 4000 feet, but breaking up and 

 clearing away towards evening. Aurora observed at 4 h . 

 There was part of a second arch and brilliant streamers 

 shooting to the zenith. Glories seen at 8 h . Strong earth 

 currents on telephone up till 4 h 30 m . 



Nov. 3. — St Elmo's Fire heard on kitchen chimney 

 and tower at 16 h . 



Nov. 4.— Thermometer box changed at 20 h 10 m . 

 Height above snow 48 inches. 



Nov. 5. — Mist cleared off and sank below summit after 

 17 h . Lunar corona? seen at 18 h , 22 u and 23 h , and a faint 



