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BEN NEVIS OBSERVATORY-LOG-BOOK, 1892. 



Jan. 1. — Thermometer box shifted at O h 25 m . Put one 

 stage higher on ladder stand. 



Jan. 2. — Very damp feel in the fog in morning though 

 the temperature was only 25° or 26°. 



Jan. 4.— Thermometer box shifted at 9 h 40 m . Height 

 above snow not altered. 



Jan. 5. — Mist in morning with temperature about 28°. 



Jan. 6. — At 2 h a light was seen to N. through thin fog, 

 possibly auroral. 



Jan. 7. — Thermometer box shifted at 12 k 25 m . Height 

 above snow not altered. Top clear from noon to 15 h . No 

 fog in valleys, but cum.-fog on hills especially to W., very 

 clear to E. 



Jan. 9. — Top clear at times during the day, but fog on 

 hills round ami passing over Ben Nevis also at times. 



Jan. 10.— Sky clear after 18 u but fog and scud blow- 

 ing over. Lunar corona seen all night. Thermometer box 

 shifted at 19 h 20™. Height above snow not altered. 



Jan. 11. — Fog among hills to "W. and N. in early 

 morning. At 12 h and at 14 h there was mist though 

 the temperatures were 18 0, 9 and 20°*7 respectively. 



Jan. 12. — Thermometer box shifted at 10 h 15 m . 

 Height above snow not altered. From 9 h to 14 u the wet 

 bulb read almost constantly higher than the dry as there 

 was thin fog blowing over. Glory and fog-bow seen at 

 10 u ; faint inner fog-bow. Top char and air dry from 

 14 h onwards, no fog in valleys. Lunar corona at 19 h , and 

 faint lunar halo at 20 h and 23 h . Streaks of cirrus all 

 evening lying W.S.W. to E.N.E., motion apparently from 

 W. There are wreaths of snow about 15 feet deep lying 

 between hotel and first gorge; the snow is up to the top 

 of the post at first gorge. 



Jan. 13. — Air very dry till 4 U after which detached fog 

 formed over hills round and from 6 h onwards covered 

 Ben Nevis also. Fog-crystals in morning brown in 

 colour. 



Jan. 15. — Thermometer box shifted at 4 h 17 m . Height 

 above snow not altered. Top clear, and sky cloudless ex- 

 cept for a little cirrus from 4 h to 13 h , but haze and 

 detached fog in valleys. Fog all afternoon, but sky 

 apparently clear above. 



Jan. 16. — Strong E.S.E. wind all day rising to strong 

 gale at night. Sky clear, but fog blowing over the hill 

 most of the day, lunar corona seen frequently on this 

 fog and scud, haze and detached cum.-fog among hills 

 round when visible. 



Jan. 17.— While taking the 5 1 ' reading the door of 

 thermometer box was blown off its hinges. The box was 

 tied up to keep the door on, and was not read again till 

 9 h when the hinge was mended. The tower thermometer 

 readings were used to fill the gap and were also used at 

 23 u and midnight. 



Jan. 18. — Tower thermometer used at l 1 ', 2 h , and 3 k . 

 The 15' 1 reading was not taken till 15 h 10 m as both Mr 

 Omond and Mr Drysdale went down to the plateau of 

 storms to meet Mr Miller. No corrections applied to 

 readings. Very thick fog all day. 



Jan. 19. — Top cleared at 14 k and was clear at intervals 

 all afternoon. Fog over the hills below, and a little cirrus 

 on sky Thermometer box shifted at 14 h 15 m . Height 

 above snow not altered. 



Jan. 22. — At 4 h , 5 h ,and 6 h there was distinct mist not fog, 

 though the temperature was only about 24°. The moon 

 was dimly visible through it. Thermometer box shifted 

 at 13 h 15 m . Height above snow not altered. 



Jan. 23. — Lunar corona seen at 5 h . Thermometer box 

 shifted at 13 h 15 m . Height above snow not altered. At 

 I6 h the temperature rose above 32° for the first time this 

 month and rain fell for 3 hours. The snow that followed 

 was hard and icy, showers of similar icy snow fell on the 

 24th and 25th. 



Jan. 26. — Top clear 14 u to 17 b , but detached fog among 

 hills, thickest to S. The top joint was put on ladder 

 stand No. 2 after 15 h . From 15 h 10 m to 15 h 25 m the ther- 

 mometer box was dismounted, it was put up in the 

 same position and with the same thermometers as before. 



Jan. 27. — The snow that fell in afternoon, after the 

 temperature had fallen and the rain ceased, was small, 

 hard, and dry. 



Feb. 2. — During the forenoon the top was deeply 

 covered with soft snow which drifted a good deal. At 

 18 h the top was free of fog, and it was noticed that the 

 N. wind was blowing the drift from the face of the cliff 

 several hundred feet straight up. By midnight several 

 places near the observatory were blown clear and the 

 old hard surface exposed. 



Feb. 3.— Thermometer box shifted at 17 h 25 m . Height 

 above snow not altered. Sky clear in evening occasionally 

 but always thin fog blowing over. 



Feb. 5. — Telegraph needle moved by earth-current at 

 2 h 35 U1 and again more faintly at 3 h l m . Heavy snow all 

 day and some slight drift. 



Feb. 7. — The 16 h observation was 4 minutes late, no 

 corrections applied to readings. 



Feb. 8. — Sky began to clear above at 20 h and from 21 k 

 onward the top was free of fog. At first there was no fog 

 on hills, but at midnight fog had gathered on those to S. 

 The clearing was accompanied by a rise in the wind-force 

 from 1 or less to 3 or more. Thermometer box shifted at 

 22 u 27 m . Put one stage higher on ladder stand. It is 

 now on the first step of the upper part of stand. 



Feb. 9. — Just at the top of the cloud layer all day. 

 When above it during the night, temperature rose, but in 

 the day temperature went up to 40°"1 even though mist was. 



