1902.] 



BEN NEVIS OBSERVATORY. — LOG-BOOK. 



459 



the summit. At 21 h 5 m the thermometers were shifted 

 to the Summer Screen. 



June 22. — A lunar corona was observed at l h . 



June 23. — Green belt, probably haze, seen above horizon 

 to E., merging into blue to S., at 18 h and 19 b . A little 

 cum. fog on hills to W. and S. after 22 b . 



June 24. — Sky overcast, or almost so, with cum.-s. in 

 forenoon and cir. and cir.-c. in afternoon, moving slowly 

 from S.W. Detached fog in valleys in early morning, 

 rising and passing over summit at times, but it cleared 

 away after 5 b . Haze all round below in afternoon, 

 thickest to eastward. 



June 25. — Sky cloudy all day, and thick haze high up 

 all round. Fog passing over summit frequently after 20 b . 

 Thunder heard between 15 h and 18 h down to E. and S.E., 

 also strong earth currents noted in telegraph cable. 



June 26. — Sky slightly clouded till 4 b with cir. and 

 cir.-s. moving slowly from S.W., cloudless since. A little 

 fog passing at 21 1 '. Thick haze high up all round all day. 



June 27. — Sky cloudless down to horizon all day, but 

 atmosphere somewhat hazy. 



June 28. — To-day the highest hourly temperature ever 

 registered at this Observatory was observed at 14 h , 6 6° '4, 

 being two-tenths higher than that of June 1887. A very 

 little cir. on sky till ll h , cloudless since. In afternoon a 

 little stratus fog clinging to hills to northward. 



June 29. — A little str. fog on hills to N. in forenoon, 

 but dispersing about mid-day. Haze in distance all day. 



June 30. — Thick haze around all day. Some fog in 

 valleys to S.E. at 2 h , and spreading round to S. and E. 

 during the forenoon; in the afternoon it rose up, till it 

 finally settled on the summit after 17 b . 



July 1. — Mist on summit till 2 h , sky almost cloudless 

 since, but fog below all round to about 4000 feet, which 

 occasionally rose and passed over summit in forenoon. 

 No fog below after 14 h . 



July 2. — Fog on hills to N. and E. in early morning, 

 but dispersing during the day. Haze all round in afternoon. 



July 5. — Fog till 4 h , clear since. Sky slightly cloudy, 

 with cir.-c. moving from W.S.W. Detached fog on hills, 

 which dispersed during forenoon ; no fog below in after- 

 noon. Air exceptionally clear from S. by S.W. to W. in 

 afternoon. Glories seen at 5 h , and part of a rainbow at 

 20 h . 



July 6. — Sky overcast with cir.-c. till 2 h , but lowering 

 and forming into cum.-s. at 3 h , then finally settling on 

 hill-top. Mist during the rest of the day, with drizzling 

 rain. 



July 12. — Summit clear in early morning. Banks of 

 fog to S.W., which came creeping up and enveloped 

 summit after 5 h . 



July 18. — To-day a vole was caught at the hotel door, 

 while eating corn along with the horses. 



July 19. — Towards sunrise, on the horizon, a green 

 haze or cloud was observed, from N. to N.E., merging 

 into a slate-coloured cloud, above which was a belt of 

 yellowish sky fringed with purple cloud. Distinct from and 

 apparently lower than these, was a belt of dull bluish cir.-c. 

 and cir.-s. clouds, on which was exhibited an early bright 

 red foreglow, the cir.-c. having a background of cir.-s. and 

 moving from N.W., giving place to cir.-s. 



July 20. — In the forenoon two sheep were seen on the 

 summit, near the hotel. 



July 21. — Several times in the early morning fleeting 

 masses of scud passed over the moon, and the following 

 colours were observed — (1) Brown with inner fringe of 

 yellow next moon, but at some distance ; (2) Green, 

 much wider than (1); (3) Outer fringe of brown. The 

 summit was clear about sunrise and onwards ; immense 

 banks of fog were piled up on hills all round to at least 

 5000 feet, and these were higher to N. than to S. At 

 9' 1 and 10 h a faint solar halo was observed. 



July 22. — At 17 h 30 m , through a break in the clouds, 

 a sulphur colour was observed over Loch Linnhe, and 

 some minutes later, when the cloud had closed up, the 

 same was noted in the cloud over the Glencoe hills. A 

 faint lunar corona was noted at midnight. 



July 25.— Summit clear from 18 b till 23 h ; at 22 h and 

 23 b a very thin fog rising from Glen Nevis and passing 

 over the hill-top kept the air saturated. A lunar corona 

 was observed at midnight. 



July 31. — Fog till 6 a.m., clear thereafter, but sky 

 overcast. There was fog in the valleys most of the day. 



Aug. 1. — Summit clear from 4 b to 8 b , with fog lying in 

 the valleys. 



Aug. 4. — Mist or cloudy sky and fog lying in the 

 valleys most of the day, which at times passed over the 

 summit. 



Aug. 8. — Clear, with air dry, till ] 5 h , but fog lay in the 

 valleys, and was observed rising from Glen Nevis at 7 b . 



Aug. 12. — Summit clear, but sky somewhat cloudy from 

 5 h till midnight. Fog lay over the surrounding hills, dis- 

 appearing after 19 h . 



Aug. 13. — Sky somewhat cloudy, but air dry all day. 

 Fog over hills all day, and passing over the Ben occasion- 

 ally in the evening. 



Aug. 15. — The summit was clear and the air dry most 

 of the day, but during the forenoon fog lay over the 

 surrounding valleys. 



Aug. 19. — Lunar coronas at 3 h and 23 h . 



Aug. 21. — After 3 h the summit cleared, but fog lay 

 over the surrounding hills. During the day the sky was 

 clouded with cumulus, but after 21 h mist came on. 

 Lunar corona at 3 b and glories at 5 h . 



Aug. 26. — After 16 h the hill-top cleared, but fog lay 

 over the surrounding hills, and passed over the Ben 

 occasionally. 



Aug. 27. — The summit was clear from 5 h till 9 b , and 

 again from 21 h till midnight. In the forenoon there was 

 fog lying over the hills to eastward and thin haze in 

 valleys. 



Aug. 30. — In the early morning detached fog lay on 

 the surrounding hills, rising gradually and disappearing in 

 the afternoon. Haze in valleys in evening. 



Sept. 2. — From 10 h to 18 b the hill-top was clear and 

 the sky somewhat cloudy. There was a thin haze all 

 round, which became more dense as the evening advanced. 



Sept. 7.— After 18 h the fog fell below the level of the 

 Ben, but lay over the surrounding hills the rest of the day. 

 At 19 b and 20 h the sky was slightly clouded with cir.-cum., 

 but was cloudless thereafter. 



Sept. 8. — All forenoon thick fog lay in the surrounding 

 valleys, rising a little about mid-day and topping the 

 lower hills, but sinking into the valleys again in the 

 evening. 



Sept. 9. — The summit was clear and the sky at times 



