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BEN NEVIS OBSERVATORY. — LOG-BOOK. 



[1904. 



Mar/ 13. — Earth currents on cable between 10' 1 35 m 

 and 10 h 53 m . 



May 15. — Glazed frost after 21 h , the temperature 

 being about 31°. 



May 16. — Summit clear from 8 h till 16 h , but thick 

 haze all round, aud a very gloomy look to E. and S.W. 

 Thermometer box changed after 8 h . Height above snow 

 44 inches. 



May 17.— St Elmo's Fire heard at 20\ Most of the 

 snow that fell to-day was in the form of small hard round 

 pellets. 



May 19.— Loose fog hanging about hill after 9 h , and 

 occasionally passing over hill-top in the evening. Earth 

 currents in telegraph cable at 9 h 25 m . Thermometer box 

 changed after 10 h . 



May 20. — Sky almost cloudless till noon, cloudy in 

 afternoon, and overcast in the evening, with cir.-s. Hazy 

 all day, becoming thicker in the evening. Detached fog 

 on hills round in early morning, but clearing away during 

 the forenoon. Solar halos seen at noon and at 17 h 50 m . 



May 21. — Gloomy overcast sky or fog all day. Very 

 thick haze high up all round. At 4 h there was cir.-c. 

 and also cir.-s. much higher and very thin, but no direc- 

 tion could be got for the motion of the latter. 



May 24. — Mist and drizzling rain till 12 h . Summit 

 clear at times till 21 h . Sky cloudless since, but fog on 

 hills round. Thermometer box changed after 22 h . 



May 25. — Detached fog on hills till 5 b and again after 

 18 h ; gradually spreading all round and enveloping hill- 

 top at midnight. Haze about all day. Shadow of the 

 Ben seen at 4 h . 



May 26. — Sky cloudy or overcast, with cir. and cir.-c. 

 moving quickly from S.W. till 15 h . Mist since, with 

 heavy rain. Earth currents in telegraph cable between 

 15 h and 16 h . 



May 27. — Sky cloudless till noon ; somewhat cloudy 

 since. Raven seen at ll h . 



May 28. — Sky cloudy or overcast till 10 h , and fog 

 during the rest of the day. Air very clear in early 

 morning. Fore-glow colours very bright at 2 h and 3 h . 

 Fog in valleys in distance to N.E. in early morning. 

 Thermometer box lowered one step on ladder after mid- 

 night. Height above snow 37 inches. 



May 29. — After 4 h fog sunk below summit to about 

 4000 feet, leaving sky slightly covered with cir.-s. 

 apparently moving rather slowly from S.W. Fog broke 

 up and disappeared after ll h . Ascending currents to W. 

 in afternoon. Haze in distance high up all day. 



May 30. — Sky almost cloudless till 16 h . Fog or mist 

 till 23 h , but summit clear again since, and sky cloudless. 

 Haze all round most of the day. The hills on opposite 

 side of Glen Nevis appeared to be much nearer than 

 usual in morning, because the tops of the hills were 

 entirely above the haze. About 4 h 30 m a great piece of 

 snow cornice overhanging the cliff between second gorge 

 and Tower point gave way, making a noise resembling 

 thunder. 



June 1. — Thermometer box lowered one step after 16 h . 

 Height above snow 36 inches. Earth currents at 8 h 55™, 

 56 m , and 57 m . 



June 2. — Mist till 3 h , summit clear since. Sky at 

 times cloudy, with cir., cir.-s., and cir.-c, moving from 

 N.W. and W. in forenoon and from S.W. in afternoon. 



Fog all round below in morning, on which glories were 

 seen at 4 h and 5 h . Solar halos seen at 12 h and 13 h . 



June 3. — Sky cloudless all day. Low-lying fog over 

 Caledonian Canal and in valleys to S.E. in early morning. 

 June 4. — Thick haze around all day. Low-lying fog 

 in valleys in early morning. 



June 5. — -Thick haze around all day. At 23 h fog 

 rising in Glen Nevis and passing over summit. 



June 6. — Thick haze around all day. Detached fog on 

 lower hills in forenoon. Thermometer box lowered one 

 step at h 7 m . Height above snow 36 inches. 



June 7. — Thick haze in early morning, but thinning 

 during the day. Low-lying fog in valleys in forenoon. 

 Sky cloudless till 15 h , somewhat cloudy till 21 h , but 

 cloudless again since. 



June 8. — Sky has been cloudless all day, except for 

 fog passing overhead at times in the evening. Fog on 

 hills to N. and E. most of the day. 



June 9. — Thin fog till 4 h . Summit clear since. High 

 fog on hills to N. and E. and passing persistently overhead 

 all day. 



June 10. — Sky cloudy most of the day. Piled up 

 masses of fog on hills to N. and E. almost all day, and fog 

 frequently passing overhead. 



June 11. — Fog in valleys to N. and E. in morning, but 

 dispersing after 9 h . Hoar-frost on roof of Observatory in 

 morning. Thermometer box lowered one step. The 

 stones are beginning to show round the foot of the ladder 

 stand. 



June 12. — Sky cloudless till 7 h . Cloudy or overcast till 

 21 h . Fog since. The cumulus cloud gradually lowered 

 till it finally settled on summit. Somewhat hazy all day. 

 A faint solar halo seen at 8 h 45 m . 



June 19. — Rat seen in early morning and again at 

 night feeding in front of kitchen window. On being dis- 

 turbed it ran in the direction of the coal-cellar or the 

 stable. 



June 20. — St Elmo's Fire observed at noon, large 

 snow-flakes falling at the time. 



June 23. — A large hare seen on summit at midnight. 

 June 25. — Summit clear after 17 h , but broken cum.-fog 

 all around below and occasionally passing. Fog-bow seen 

 at 18 h . 



June 26. — Lunar corona at midnight. Heard call of 

 ptarmigan at 4 h * Also heard croak of ravens in cliff. 



June 28. — Began to use summer thermometer screen 

 before l h to-day. Variable amounts of cir., cir.-s., and 

 cir.-c. on sky, radiating chiefly from N.W. and S.E. and 

 moving from W.S.W. Atmosphere became somewhat 

 hazy in the evening. 



June 29. — Various cirri-forms on sky, moving chiefly 

 from S. No snow at snow post A to-day, but there is still 

 a good deal on other parts of the hill-top. 



June 30. — Somewhat cloudy and very hazy throughout 

 the day. Almost daily throughout June a pair of snow- 

 buntings have been seen on summit. They begin to sing 

 between 2 h and 3 h , and keep it up till very late at night. 



July 3. — Showers of sleet and snow. At 7 h the 

 summit was covered with fresh snow. St Elmo's Fire 

 heard at the Plateau of Storms (4000 feet) about noon. 



July 9. — Earth currents in telegraph cable noted 

 between 10 h and ll h . 



July 10. — Summit clear, but fog lay in the valleys all 



