224 



BEN NEVIS OBSERVATORY. — LOG-BOOK. 



[1890. 



all round, and beginning to pass summit. A glory was 

 seen at 20 h . 



June 27. — Summit quite white with freshly fallen 

 snow at 2 h . 



June 28. — Summit clear most of the day. At 17 h 

 40 m part of a rainbow, double at times, was seen on a 

 passing shower to S. At the same time ragged clouds 

 floating at from 3000 to 4000 feet to S.E. in line with 

 observer's shadow, which fell about thermometer box and 

 did not project beyond hill, were seen to be variously 

 coloured, chiefly red and blue. There was no " ringed " 

 order in the colouring, the red and blue being mixed all 

 over the cloud. The only order that could be made out 

 was that the colours seemed to be arranged round 

 patches and along the edges of narrow stripes in the 

 cloud. They seemed exactly the same as coloured clouds 

 seen sometimes near the sun and moon. The 23 h obser- 

 vation was made at 23 h 5 m . 



June 29. — At l h pearly cirrus was seen in N. sky from 

 N.E. to N.W., and reaching to 25° altitude. Ribbed 

 structure, motion from N. At 2 h pearly cirrus gone. 

 Summit clear most of the day, but fog on hills all round 

 and passing at times. 



June 30. — Strong S.E. to E. winds till 5 p.m., backing 

 thereafter to N.E. and N., 75 miles were recorded by 

 anemometer at noon for the previous hour. 



July 2. — Passing showers on Ben Nevis, and in dis- 

 tance all around after 18 h . During a heavy shower of 

 snow at 20' 1 10 m , St. Elmo's Eire was heard on chimney, 

 tower, observer's hair and pencil ; loud hissing, and, at 

 times, crackling sound heard. 



July 7. — Snow falling continuously after 8 h to-day, 

 and heavily after 20 h . There were 3 or 4 inches of 

 freshly fallen snow on summit at midnight. The max- 

 imum shade temperature to-day was only 32° - 5. 



July 13. — Heavy rain falling all day. At and after 

 ll h the temperature was above 45°. At midnight it was 

 47° T ; the highest reading in shade since May 25th. 



July 16. — Pearly cirrus noted at midnight low to N. 

 about 5° altitude. Not above the green of sky, colours 

 of N. sky being yellow, green, and blue. Shower of 

 snow at ll h . 



July 17. — Pearly cirrus noted at l b , as at midnight 

 (16 h ). Hoar frost on roof in early morning. Foreglow 

 noted at 3 h 15 m . A halo was seen at 14 1 '. In morning, 

 radiating points of cirrus were W.S.W. and E.N.E., at 

 14 h the radiating point was S. by W. 



July 19. — Summit clear all day. Detached fog on 

 hills in forenoon. Foreglow seen at 3 h 18 m . Shadow 

 of Ben seen to W. at 4 h . Very clear to S.W. at 21 h . 



July 21. — Clearing in forenoon, but fog in valleys. 

 Solar halo seen at 21 h . 



July 27. — Solar halo seen at 16 h . 



July 28. — St. Elmo's Eire heard at 5 h 18 m , and seen 

 at 23 h . Showers of sleet and rain falling at both times. 



Aug. 1. — Summit clear most of the afternoon, but fog 

 on hills around. Sky cloudless after 22 h . At midnight 

 thin fog was rising from N. corry and passing. On this fog 

 a lunar corona was seen, and also a glory and fogbow. 



f outside 3°-38. 

 | inside 2° - 7. 

 , ( outside 7°*15. 

 ! inside 5° - 48. 



Corona, radius inner red 



outer 



Glory — no colour, only one white ring, two measurements 

 of outside of white ring gave 5° 39', and 5° 43' as radii 

 respectively. Inside of fogbow, 33° 42'. 



Aug. 12. — Heavy showers throughout the day; rain, 

 and at times, hail. St. Elmo's Fire was heard at 15 k 

 and 16 h . 



Aug. 13. — Top clear most of the day, but detached fog 

 on hill below. A rainbow was seen at 18 h . 



Aug. 25. — Fog on hills and over Lochs till 10 h , but 

 almost continuous mist on the top thereafter. 



Aug. 27. — Ground all white with snow at l h , which, 

 however, thawed off in the forenoon. 



Aug. 29. — Sun rose from behind a cloud bank at 5 h 

 25 m . The upper glow was seen at 4 h 50 m , and the Ben 

 shadow and earth shadow shortly before sunrise. Lunar 

 corona seen at midnight. Sky clear in early morning 

 and at night, but fog and scud passing over the hill top. 



Aug. 30. — Sky cloudy with scud and cum., and 

 occasional fo« on hill top, but air very clear to S.W. in 

 afternoon. Double lunar corona at midnight. 



Aug. 31. — Haze and streaks of fog in valleys all 

 morning, light fog on Ben Nevis also about sunrise. 

 Cumulus forming over hills in afternoon, and mist on Ben 

 Nevis at night. Air clear all round in forenoon and early 

 afternoon. 



Sept. 4. — Mist all day which sank down at night to 

 about 4000 feet. Glories seen about sunset. A lunar 

 fogbow at midnight. 



Sept. 5. — Fog lay over the hills at 4000 feet till noon, 

 after which it broke up into detached portions, but mist 

 came on Ben Nevis in the afternoon, and continued with 

 occasional breaks all night. 



Sept. 6.— Mist passiug till 4 a.m. Summit clear, and 

 air very dry in the afternoon. Fog lay in valleys all 

 round till 7 a.m. Haze in distance. 



Sept. 7. — Sky nearly cloudless except for a little cirro 

 cumulus in early morning. Air very dry in the afternoon, 

 detached fog on hills to N. and E. Haze all round, 

 thickest to W. Fog came on at 21 h , clearing at times. 



Sept. 11.— Mist all day till 18 h , clear till 20 h , when 

 the air was dry, and fog on hills to 4000 feet all round. 

 Glories were seen at 19 h . 



Sept. 12. — Mist till 7 h , and detached fog on hills 

 nearly all day. Sky clear except for a little cirrus till 

 18 h , after then sky cloudless. Fogbows were seen this 

 morning. 



Sept. 13. — An aurora, single arch with faint streamers, 

 was seen at l h . Sky almost cloudless all day, but fog lay 

 in valleys till noon, since then haze began to form in the 

 S.W. and "W., and at 18 h very thick haze all round. Air 

 very dry all day till midnight, when fog came on. 



Sept. 19. — Fog lying in valleys and over lochs till 7 h ,. 

 after that mist on summit with occasional breaks and 

 sunny intervals. 



Sept. 22. — Mist till 20 h , since then sky overcast and 

 fog in valleys all round. 



Sept. 23. — Sky clear except for a little cirrus at ll h 

 and 12 h ; after that fog came on. A solar fogbow and 

 glories were seen. 



Sept. 30. — Fog cleared off the Ben at 6 h , leaving sky 

 covered with cumulus stratus ; detached fog on hills all 

 round to 4000 feet till ll h , since then log has come on 

 summit again. 



