458 



BEN NEVIS OBSERVATORY. — LOG-BOOK. 



[1902. 



Dry 1392449, Wet 1392450, were taken in, and Dry 

 535541, Wet 535542, put out in their stead. 



April 12. — After 17 h several snow-buntings were seen 

 flying about the cliffs. 



April 13.— St Elmo's Fire noted at 23\ Thermo- 

 meter box changed at 2 h 15 m . Height above snow not 

 altered. 



April 14. — Thermometer box changed at 12 h 15 m . 

 Height above snow not altered. 



April 15. — Cloudy sky and fog till 9 h and thick haze 

 below all day. Earth currents in telegraph cable in early 

 morning. Thermometers changed at 10 b . 



April 17. — Lunar corona seen after 21 b . 



April 18. Summit clear after ll h , but sky very 

 cloudy and haze below in afternoon. A fly seen on 

 snow on summit, and a raven at the Plateau of Storms. 

 Thermometer box changed after 3 h . 



April 19. — Summit clear till 5 h and again after 19 b , 

 but sky cloudy. Thermometers changed after 20 h . 



April 20. — Summit clear from 17 b till 20 h , but sky 

 almost overcast. Thermometers changed after 20 h . 



April 22. — Strong south-easterly gale all day, at times 

 reaching hurricane force, moderating somewhat after 22 b . 

 The mean wind force for the 24 b was 8 - 5 = 72 miles per 

 hour. Temperature high all day, with very heavy rain, 

 but considerable icy surface drift during the day. Depth 

 of snow to-day 52 inches, having thawed 6 inches since 

 yesterday. Thermometer box lowered one step at 17' 1 . 

 Height above snow 43 inches. 



April 25. — Fog on hills in forenoon, passing showers 

 to N.E. and S.E. and very thundery-looking in afternoon. 

 A slight, shower of hail between 18 b and 19 h . Glories 

 seen at 7 h . Coast lights seen to S.W. at 3 h . Ther- 

 mometer box changed after l u . 



April 26. — Sky cloudless, or almost so, except from ll 11 

 till 18 h , when it was very cloudy or overcast. Fog in 

 valleys most of the day. Passing showers to E., N.E., 

 and S.W. during the day, and haze around all day. 



April 27. — Sky cloudy most of the day, but cloudless 

 in the evening and fog below all round. 



April 28. — Fog all round in forenoon, breaking up and 

 disappearing in afternoon. 



April 29. — Summit clear, but sky cloudy, with cir.-c. 

 and cir.-s. till 8 h , the latter moving slowly from about 

 W.N.W. Detached fog in valleys rising up and envel- 

 oping hill-top during the rest of the day. A small part 

 of a solar halo, with mock-sun, seen at 6 h and 7 1 ', and 

 glories at, 8 1 '. 



May 1. — Summit clear all afternoon, but fog on hills 

 around. Air very clear in afternoon to S.W. and S. 

 Thermometer box changed at 12 h 10 m . 



May 4. — Summit clear from 9 h till 14 h , but sky 

 overcast. St Elmo's Fire heard on top of thermometer 

 ladder and kitchen chimney at 18 il . Very heavy fall of 

 snow at the time. Thermometer box changed at 9 b 10 m . 



May 5. — St Elmo's Fire heard on kitchen chimney, 

 accompanied with a heavy shower of hail. Thermometer 

 box changed at 6 b 10 m . 



May 8. — Fog or cloudy sky all day. Air slightly dry, 

 and very clear in the afternoon. Thermometer box 

 changed at 7 b 5 m . 



May 9. — Fog hanging about hills around all day, but 

 air above very clear and at times very dry. 



May 10. — Sky cloudless till 3 b ; overcast or fog since. 

 Fog on hills all round most of the day, and atmosphere 

 very hazy. Solar halo seen at 12 h , 17 h , and 18 b . 



May 12. — Summit clear from 9 h till 15 h , but sky over- 

 cast. Thermometer box changed at 10 h 5 m . 



May 16. — Solar halo seen at 13 h . Thermometer box 

 changed after l b . 



May 19. — Thermometer box changed at 18 h 5 m . 



May 20. — Lunar corona; seen at 23 b . Thermometer 

 box changed 12 b 5 m . Box again changed after midnight. 



May 21. — Sky cloudy or overcast with cir.-c. and cir.-s. 

 Fog below most of the day, and at times passing over the 

 summit. Solar halo seen at 8 h and 14 b . 



May 23. — Summit clear with fog below all round from 

 7 h till ll 1 '. Mist during the rest of the day. Lunar 

 corona seen at midnight. Thermometers changed at 

 23 h . 



May 29. — Thermometer box changed at 12 b 15 m . 



June 1. — Fog or mist during the day, but at 21 h the 

 fog sank into the valleys, and left the summit clear. 

 Earth current in telegraph cable noted at 22 h 35 m . 



June 2. — Fog or mist till 21 b , when the fog sank into 

 the valleys, and the sky was cloudless. In the forenoon 

 the mist was very wet. At 15 b the thermometer box 

 was lowered one stage. In the evening, after hearing 

 that peace had been proclaimed in South Africa, the 

 observers made a bonfire on the Tower Ridge. 



June 3. — Till 14 b there were only upper clouds in the 

 sky, but all morning fog was lying in the valleys and 

 passing over the summit at times. After 15 b the clouds 

 were chiefly cumulus. It was very hazy all day. 



June 4. — The summit was clear at times in forenoon, 

 but fog was lying among the hills, and occasionally 

 passing over the summit. 



June 8. — -Thermometer box changed after 5 h . Snow- 

 buntings are now seen daily on the summit. 



June 9. — After 13 b the thermometer box was changed. 



June 10.— In early morning some thin fog lay in the 

 valleys and occasionally rose near the summit. The 

 horizon was somewhat hazy at times. 



June 16.— Mist or fog till 20 b . The summit then 

 cleared, while an immense mass of rolling fog lay to 

 the N. and E. Cirrus and cir.-cum. predominated in 

 the sky, the cir.-cum. being hard packed. At various 

 hours throughout the day the same cloud was observed 

 through the fog. 



June 17. — Throughout the day a fairly thick fog lay 

 on the summit, but during the greater part of the day the 

 wet bulb read lower than the dry. At 14 b the thermo- 

 meters were changed, but the results were the same. 



June 18. — For the most part the sky was cloudless, but 

 thick fog lay in the valleys in early morning, while a haze 

 lay round the entire day. At 22 b fog began to pass and 

 thereafter settled down on the summit. 



June 20. — A strong wind blew from the S.E. all 

 day. At 13 h the sky was covered with dull grey cir.-s., 

 below which floated mackerel cir.-c. in some places. To 

 the E. a belt of green sky was seen about the horizon, 

 and great masses of cum. fog to N. and W. To S. the 

 cir.-s. had in some parts different shades of red and 

 yellow. 



June 21. — At 15 b there was no snow at the gauge post, 

 though a considerable amount still lies on some parts of 



