1895.] 



BEN NEVIS OBSERVATORY. — LOG-BOOK. 



279 



box shifted at ll h 10 m - Height above snow not 

 altered. 



Feb. 8. — After the fog cleared off at 3 h the air was 

 very hazy all round and continued so all day. At 19 h , 

 22 h and midnight, a faint lunar halo was seen. No fog 

 below all day. Thermometer box shifted at 3 h 15 m . 

 Height above snow not altered. 



Feb. 9. — Fog all round below in early morning, and 

 passing summit at times. A little cirrus on sky till 

 10 h ; cloudless during rest of day, but thick haze below. 

 Aurora seen at night. 



Feb. 10. — Air very dry all day. Cloudless till ll h and 

 some cirrus on sky during the rest of the day. Lunar 

 halo seen at 20 h and 21 h . 



Feb. 11. — Sky almost cloudless all day and no fog 

 below in morning, but some on hills to E., N.E. and S.E. 

 in evening. Zodiacal light seen at 20 h . 



Feb. 12. — Almost cloudless all day, but fog below in 

 morning, and again at night. Zodiacal light seen at 20 h 

 and 21 h and a lunar halo at 23 h and midnight. 



Feb. 13. — Fog came on 8\ and a little snow fell till 

 16 h . Summit cleared again after 20 h . Zodiacal light 

 seen at 21 h ; a lunar halo seen at l h and the aurora at 

 midnight. 



Feb. 14. — Fog came on at 7 h and remained for rest of 

 day. Strong S.E ly winds to-day. 



Feb. 15. — -Fog on summit or passing all day but sky 

 above cloudless. At 20 h a bright auroral bow was seen in 

 sky stretching across from horizon to horizon through 

 zenith. Aurora again seen lower down at 22 h , 23 h and 

 midnight. At midnight the streamers were very bright 

 and active. 



Feb. 16. — The aurora continued visible till 5\ being 

 bright till 3 h but faint thereafter. It was seen again at 

 and after 20 h . Sky cloudless except for a little scud 

 passing at noon. Air very dry at night. 



Feb. 17. — Not a particle of cloud seen to-day either 

 above or below summit. Aurora seen till 5 h and at and 

 after 20 h . At the latter hour the zodiacal light was seen. 

 Air exceedingly dry to-day, humidity being below 20% 

 at l h and 3 h and from 15 h till midnight. 



Feb. 18. — -The south-easterly wind that has been blow- 

 ing since the morning of 13th died out this afternoon. 

 Aurora seen in morning and again at night and the 

 zodiacal light at 20 h . Air very dry again to-day, the 

 maximum humidity being only 28%. To-day the 

 temperature rose to the freezing point for the first 

 time since 25th Dec. 



Feb. 19. — Cloudless, and air very dry all day. Aurora 

 seen in morning and at night, and the zodiacal light 

 at 20 h . 



Feb. 20. — Cloudless and air very dry till ll h . Fog for 

 the rest of the day. Aurora seen at l h and 2 h . 



Feb. 25. — Aurora seen at l h . Thermometer box 

 changed at 14 h 15 m . Height above snow not altered. 



Feb. 26. — Wet mist and drizzle this morning with the 

 temperature between 26° and 28°. 



Feb. 28. — Lightning seen at 23 h . 



March 2.— Thermometer box shifted at 20 h 15 m . Box 

 put one step up on ladder stand. 



March 5. — Fog in morning. Mist at and after 9 h with 

 drizzling rain or snow. Temperature below 30°. 



March 7. — Fog or mist on top, with clear intervals till 



5 h . Fog below all round, but top clear and sky cloudy till 

 9 h . Cloudy sky with fog passing over hill-top during the 

 rest of the day. Lunar fogbow seen at 3 h . Thermometer 

 box shifted at 7 h 15 m . Height not altered. 



March 8. — Thick fog depositing brown fog-crystals all 

 day. 



March 9.— Thermometer box shifted at 17 h 10 m . 

 Height not altered. 



March 11. — Delicate hexagonal snow crystals were 

 falling at 23 h and midnight. Temperature 18° to 19°. 

 Box shifted after 20 h . Height not altered. 



March 12. — A mouse was caught alive in kitchen 

 to-day. 



March 15.— Thermometer box shifted at 7 h . Height 

 not altered. Solar halo seen at 7 h 15 m . 



March 17. — Mist with ice forming from drizzle till 8 b . 

 Fog till 19 h . Clear thereafter. Aurora seen at 21 h and 

 zodiacal light at 22 h . Thermometer box shifted at 20 h 

 1 5 m . Height not altered. 



March 22.— Thermometer box shifted at ll h 10 m . 

 Height not altered. 



March 25. — In early morning several clicks were 

 heard on telegraph instrument caused by earth currents. 

 Lightning was seen at 4 h . 



March 27. — Thermometer box shifted at 5 h 10 m . 

 Height not altered. 



March 28.— Very stormy after ll h . Tower box used 

 at night. Comparison readings with Stevenson Screen 

 showed no difference except that due to instrumental 

 correction. The gale blew open the thermometer box 

 after 15 h and hinges got twisted so that it could not be 

 closed. A fresh box put out. Owing to the heavy drift 

 and high wind the gauge was not out after 10 h . The 

 observer was blown down several times at every obser- 

 vation in evening. 



March 29. — Tower Screen continued in use till 2 h . 

 At 3 h readings in Stevenson were resumed. 



April 1.— Thermometer box shifted at 22 h 20 m . Height 

 not altered. 



April 5. — Summit clear till 5 h ; sky overcast at first 

 with cirro-stratus showing a lunar halo, and afterwards with 

 cum.-s. At 5 h a few pellets of snow and a few drops of 

 rain were falling. Temperature 19° - 5. 



April 1. — Thermometer box shifted at l h 15 m . Height 

 not altered. 



April 11. — Small needle-shaped snow crystals falling 

 at midnight. Temperature 22°"0. 



April 12. — Slight showers of snow in forenoon. (Seven- 

 teen people visited the Observatory to-day, nine of whom 

 were members of the Scottish Mountaineering Club.) 



April 13. — Thermometer box shifted at 3 h 20 m . Height 

 not altered. Aurora seen at and after 22 h . At 18 h , just 

 before thick haze came on, the Outer Hebrides could be 

 seen very distinctly. 



April 1 4. — Almost cloudless and air dry all day. Aurora 

 seen at l h , 2 h and 3 h . Some haze all round most of the 

 day, and till 10 h there was low-lying fog on Moor of Ran- 

 noch and in valleys to E. No fog below after that. 

 Temperature rose above 40° "0 for first time this year. 



April 15. — Cloudless almost all day. Aurora seen at 

 2 h . No fog below to-day, but hazy especially in evening. 

 A snow bunting was seen at 5 h , the first seen on summit 

 this year. Throughout the day it was seen several times ; 



