72 



BEN NEVIS OBSERVATORY. — LOG-BOOK. 



[1888. 



It was observed that the large therm ometer box, which is 

 now in use, was in shade for the first time at 20 h , but that it 

 got sunshine again at and for a few minutes before 21 h . 



June 23. — Fog gathered among the N. hills in 

 early morning at 2000 or 3000 feet. It also lay on the 

 Moor of Raunoch about sunrise. The upper glow and 

 earth shadow were seen at 3 h , and the shadow of Ben 

 Nevis after sunrise ; this last was first seen at about three 

 times the height of Mull hills. The sun was first seen at 

 3 h ll m , having been thus just 5 h 44 m out of sight. 

 Horizon hazy all day, but the fog was all gone by 8 h . Cirrus 

 clouds about the X. horizon all day, forming at midnight 

 both pearly and dark cirrus. At 22 h the after glow was 

 seen. N. horizon red all night. 



June 24. — At 2 U fog gathered in Caledonian Canal 

 Valley, N. of Loch Oich and on Moor of Rannoch. The 

 latter vanished shortly after sunrise, but the former did not 

 disappear altogether till about 9 h . At 2 h 45 m upper glow 

 seen. Sun was first seen at 3 h 15 m . The earth shadow 

 was seen before, and the shadow of Ben Nevis after 

 sunrise as usual. Horizon hazy all day, except to N. 

 where it was very clear in the forenoon ; Ben Wyvis seen 

 at 10 h . The sun was last seen at 21 h 26 m . After glow 

 observed at 22 h . N. horizon red all night, and a little 

 pearly cirrus. 



June 25. — Fog formed in the Caledonian Canal Valley 

 as far S. as Loch Oich in early morning, but it cleared 

 off about 8 h . Bright upper glow at 3 h . Sun rose at 3 h 

 16 m . Shadow of Ben Nevis after sunrise rather faint. 

 The suu was last seen at 21 h 26 J m . At 21 h the shadow 

 of Ben Nevis was observed to S.E., and at 22 h the after 

 glow. N. horizon red all night, with a little pearly 

 cirrus above it. 



June 26. — Low fog, not over 1000. feet height, in 

 Caledonian Canal Valley, as far S. as Loch Oich in 

 early morning ; it cleared off about 7 h . The sun was first 

 seen at 3 h 18 m . Faint solar halo seen at ll h . N. 

 horizon red at night, with pearly cirrus above it- Both 

 yesterday and to-day it has been very hazy all round. 



June 27. — Very bright pearly cirrus to NT. at l h . Upper 

 glow seen at 2 U 50 m . Earth shadow at 3 h . Sun first 

 seen at 3 h 18J m . Shadow of Ben Nevis seen very 

 distinctly after sunrise. At 3 h there was low-lying fog 

 on Loch Ness, but it cleared off before 5 h . Cumulus 

 clouds gradually formed in forenoon, and for most of the 

 day after 7 h fog was on or near the hill top, but the fog 

 was almost quite dry. At 20 h a few misty, badly-defined 

 glories were seen on large masses of cum. fog to E. 



June 30. — Fog on or passing over hill top till 6 h . At 7 h 

 fog on hills everywhere except to S. at about 4000 feet. 

 This fog continued to hang about the hills to N.E. all day, 

 forming at night a thick bank of cum. fog just beyond the 

 Aonach More and Beg. After glow observed at 21 h 35"'. 

 N. horizon red all night, and pearly cirrus very bright 

 to N. and N.E. Hazy to S.W. and W. all day. 



July 1. — Upper-glow seen before sunrise, brightest at 

 about 3 h 5 m . Sun first seen at 3 h 27 m . Pearly cirrus at 

 2' 1 . Thin layer of fog capping the hill tops to N. and E. 

 till about 8 h , and haze at horizon all day. The cirrus 

 clouds seen in the afternoon came on from the W., but 

 their own motion was from N.W. or N. The cumulus 

 which covered the sky at 22 h had come up rapidly from 

 the S. since 21 h . During all the late fine weather the 



thermometer box in use was iu shade at 20 h , and in sun 

 again at 21 1 ' as noted on p. 71 (June 22). 



July 2. — Sun first seen at 3 h 22 m . Dark crimson 

 sunrise colours. Sky too cloudy to see upper glow. Earth 

 shadow and Ben Nevis shadow. Horizon hazy all morn- 

 ing. Cum. fog among hills to E. and S.E. from after 

 sunrise till noon, when it covered Ben Nevis also. In the 

 course of the afternoon the fog turned to mist, and rain 

 came on. 



July 6. — Top cleared at l h , but fog lay over the hills 

 round, especially to N., till about noon. The sun was first 

 seen rising above this fog at 3 h 40 m . The upper glow 

 was seen at 3 h 5 m , and the earth shadow before and the 

 Ben Nevis shadow after sunrise as usual. Air very clear, 

 especially to the S. and W. in afternoon. South Uist and 

 Islay seen. Passing showers to E. at 17 h . In the even- 

 ing showers of snow fall, and before midnight the roof 

 was quite white. 



July 7. — Mist cleared off a little before 3 h . Detached 

 fog on hills or rising out of valleys all round till 10 h . 

 The sun was first seen at 3 h 31 m . No upper glow or 

 shadows seen as the sky was overcast. Passing showers 

 to E. a great part of the day ; a portion of a rainbow was 

 seen on one at 19 h . Rolling cum. fog in N. valley at 

 night, and fog among hills to N. and N.W. N. horizon 

 red all night. Pearly cirrus seen to N. and N.E. at 

 midnight ; that to N. silvery white and to N.E. slightly 

 yellow. 



July 10. — From 10 h onwards the hill top was quite 

 white with fresh fallen snow. When clear of fog in 

 afternoon, visibility to W. and S., and no fog in 

 valleys. 



July 11. — Top cleared at night, but fog continued to 

 drift across the hill top till almost midnight. At mid- 

 night N. horizon was faintly red, but no pearly cirrus was 

 seen. 



July 12. — Cum. fog on hills to N. and W. in early 

 morning. Sun first seen at 3 h 45 m . Earth shadow seen 

 before and Ben shadow after sunrise as usual. No low 

 fog in valleys during the day, but considerable haze and 

 fog in valleys between 19 h and 20 h . Glories with 

 three sets of colours were seen on fog passing the E. end 

 of the hill. At midnight the clouds sank low down, fog 

 surrounded the hill, and drizzling rain came on. 



July 14. — At 2 h fog lying in N. valley to about 4000 

 feet, and detached fog among hills. Misty solar corona 

 seen at 4 h . Fog low down in valleys, not reaching 500 

 feet, at 6 h and 7 h . Fog hanging about the hills round 

 all day, except for a few hours in afternoon when it was 

 very clear to N. No fog in valleys at night. 



July 18. — Detached fog in valleys and among hills 

 in early morning. This fog hung about the hills to N.E. 

 till ll h , but in the afternoon there was no fog in the 

 valleys, and the air was very clear, though with occasional 

 showers passing to S. The rain that fell on Ben Nevis 

 consisted of short heavy showers, like thunder showers, 

 but no thunder was heard nor lightning seen. A portion 

 of a solar halo was seen at 17 h . 



July 19. — Low fog clinging to the watercourses in 

 Caledonian Canal Valley and its tributaries in early 

 morning. This cleared off about 8 h , and after that hour 

 there was no fog in valleys, but thick haze gathered all 

 round in the afternoon. The sun was first seen at 3 h 46 m 



