1897.] 



BEN NEVIS OBSERVATORY. — LOG-BOOK. 



467 



ill morning. Clear at mid-day. Fog at night, with showers 

 of snow both in morning and at night. 



May 26. — Fog or mist with showers of snow till 17 h . 

 Clearing thereafter : and at night as clouds and fog 

 dispersed the air was very clear, but the sky somewhat 

 hazy. Hoar frost on roof at night. Dry readings got 

 while thin fog on summit at 16 h and 17 h . 



June 3. — Mist or fog till 9 h . Cloudy during the rest 

 of the day, hut summit clear. The humidity fell to between 

 38 to 42 at night. 



June 4. — Str.-fog in some valleys all morning, but 

 summit clear and sky slightly cloudy all day. The 

 observer heard the cuckoo from Wragge's Well at 20 b . 



June 5. — Sky somewhat cloudy and summit mostly 

 clear all day, but fog all round in early morning and large 

 masses of summer cumulus hanging about in afternoon. 



June 6. — Cloudy all morning and fog all round below, 

 which gradually rose and enveloped summit all afternoon. 



June 13. — Summit clear all evening and detached bits 

 of str.- and cum.-fog below. Mock sun seen at 20 h (S rn- 

 side of sun). 



June 14. — A very heavy shower of hail fell at 9 h 45 m . 

 At 10 h the amount in gauge measured 0-529 inch. In 

 evening (18 u to 20 h ) with easterly winds at Obser- 

 vatory a steady westerly wind was observed from the top 

 of M'Lean's Steep to the Plateau of Storms. 



June 24. — Mist on summit occasionally till 9 h ; clear 

 since, but sky cloudy or overcast. Fog on hills below all 

 round during the forenoon, but after 15 h fog had com- 

 pletely disappeared. Sky dull and gloomy-like to S. and 

 S.E. towards evening. Air slightly dry most of the 

 day. 



June 25. — Summit clear and air dry from ll h to 20 h , 

 but sky somewhat cloudy and thick haze all round. Very 

 thundery-looking all afternoon. 



June 27. — Top clear after 10 h , but sky overcast and 

 thick haze all round. A raven seen near Observatory at 

 12 h 40 m . 



June 29. — Very fine and warm and sky pretty clear all 

 day. Wet fo^ on hills all round and air somewhat hazy. 

 Air slightly dry most of day. Glories seen at 5 h from 

 roof of Observatory. 



June 30. — Summit clear till 10 h : fog off and on there- 

 after. Fog on hills to N. and E. in the early morning, 

 and gradually spreading all round and passing over 

 summit after 10 h . Slight showers of rain in the after- 

 noon. Thick haze all round. A six. ringed rainbow 

 (glory ?) seen at 20 h . 



July 1. — Hill-top clear most of the day, but fog all round 

 and passing occasionally till 18 h : since then sky has been 

 almost cloudless and air very dry, the humidity being as 

 low as 45 at 23 h and midnight. Slight haze about in the 

 evening. 



July 2. — Sky overcast and detached fog on hills all 

 round till ll h . Mist or fog since, with showers of rain 

 after 16 h . Air dry in early morning, the humidity being 

 43 at 1\ 



July 10. — Fog till noon. Summit clear and sky almost 

 cloudless since. Fog all round below, but gradually 

 breaking up after 19 h , and by 22 h the fog had all dis- 

 appeared. Slight haze all afternoon. Air very dry at 

 times in the evening, the humidity being as low as 38 at 

 midnight. Shadow of Ben seen at 21 h . 



July 11. — Sky cloudless all day except for a little cirrus 

 between 4 h and 9 h . Air dry all day and very dry at times, 

 the humidity ranging from 30 to 92. A little cum.-fog 

 hanging about valleys to the S.W. in the forenoon. 

 Slight haze near horizon all day. 



July 12. — Sky cloudless or nearly so and air dry. 

 Haze in valleys around all day : thin in the morning, but 

 getting thicker towards the afternoon and rising up to 

 about 6° above horizon. Shadow of Ben seen at 4 h . 



July 13. — Air dry all day : very dry at times, the 

 humidity ranging from 26 to 91. Sky cloudless all day 

 except for a little scud passing between 17 h and 20 h . 

 Thick haze around all day. Detached fog in valleys 

 to S.E. in early morning. Shadow of the Ben seen at 

 iK 



July 14. — Air dry and very clear all day. Sky almost 

 cloudless. A little cir. and cir.-cum. on sky towards mid- 

 night and a slight haze in the early morning to W., but this 

 all cleared away during the day. 



July 15. — The air has been unusually clear and dry, 

 the humidity ranging from 37 to 63. Sky a little cloudy 

 with cir.-cum. till 5 h . Cloudless since. Shadow of the 

 Ben seen at 4 1 '. 



July 16. — The air was very clear and dry, the visibility 

 being 5 most of the day. Sky cloudless till 10 a.m. Cloudy 

 or overcast since with cirrus and cir. -stratus. Shadow of 

 the Ben seen at 4 h . 



July 17. — Sky cloudy or overcast all day, but still very 

 fine though somewhat hazy in the distance. Some fog in 

 valleys to N. and N.E., but this cleared away after 9 h . 

 Shadow of Ben Nevis seen at 4 h . 



July 18. — Cloudy till 6 h . Cloudless since. Detached 

 fog in valleys to N. and N.E. in the forenoon. Thick haze 

 around all day. Shadow of Ben Nevis seen at 4 h . 



July 20. — Detached fog in valleys till 12 h and slight 

 haze the rest of the day. 



July 21. — Slightly cloudy till 12 h . Fog forming among 

 hills all morning and enveloping the Ben at 17 h . 



July 22. — Summit cleared after 2 h . Thick fog all 

 round below to about 4000 ft., coming over summit again 

 at 9 h . Fogbows and glories were seen after 9 h . 



July 28. — Clear for a few hours about mid-day. Sky 

 cloudy or overcast. Fogbows and glories seen between 

 10 h and ll h . 



July 30. — Summit cleared after 5 h and remained clear 

 for the rest of the day. Fog all round below, dispersing 

 towards evening. 



Aug. 1. — Fog on summit in early morning and in 

 valleys and on other hills most of the day. Solar halo 

 seen at noon, 17 u and 19 h . Almost continuous flashes of 

 lightning from 21 h 55 m till midnight. 



Aug. 2. — Fog all morning. Clear all afternoon, but 

 broken fog all around till 19 h , when it gave place to haze. 

 Lightning seen at h 45 m . 



Aug. 3. — Summit clear all day. Cumulus-fog around 

 below. Rather hazy. Solar halo se^n at 17 h . 



Aug. 4. — Summit clear till 21 h . Thick haze all around 

 and some fog in eastern valleys in forenoon. Fog on 

 summit after 22 h . Lightning flashes at intervals of 1 

 to 5 minutes from 22 h till midnight. 



Aug. 5. — Fog or mist with clear intervals all day. 

 Lightning seen at l h , and thunder and lightning noted 

 from 22 h till 22 h 40 m , and again at 23 h 20 m . 



