462 



BEN NEVIS OBSERVATORY. — LOG-BOOK. 



[1902. 



heard and lightning seen three times between 14 h and 15 h , 

 and a brilliant display of St Elmo's Fire was observed at 

 19 b . Barometer pumping all day. 



Dec, 31.— The hill-top cleared after 7 h . After that 

 the sky was pretty well covered with cirrus or cir.-str. 



till 18 h , then cloudless. Haze lay in the valleys all day. 

 At 9 h 15 m a winter thermometer box was put out on 

 ladder stand, and the hourly readings were thereafter 

 taken there. At 15 h the depth of snow at gauge was 14 

 inches and the bulbs were 41 inches above snow. 



INSTRUMENTS, ETC., 1902. 



Barometer No. 1385 has been in use throughout the 

 year, and No. 1252 kept in reserve. 



Thermometers :— Dry bulbs 535541, 1392449 and 

 Wet 535542, 1392450 were in regular use. Min. No. 

 116918 was used in the large screen, and Min. No. 

 1108531a in the small winter screen. 



From 21st June to 31st December the thermometers 

 were exposed in the large Stevenson screen, and during 

 the rest of the year in the small pattern fixed to Ladder 

 Stand No. 2. 



The Richard Barograph, Campbell-Stokes Sunshine- 

 recorder, and Hilger's pocket spectroscope were in use 

 throughout. 



A number of observations were taken with the 

 Stephanome. 



Neither the Dust Counter nor the Robinson Anemometer 

 have been in working order. The latter, however, was 

 started in October, but only a few observations were 

 got, when it had to be taken in for the winter. 



The same two 5-inch rain-gauges have been in use 

 summer and winter. 



The depth of snow has, as usual, been measured at Post A. 



Communication with the Low Level Observatory and 

 Fort- William P.O. has been maintained by telephone. 



The Anemograph clock is still used as the standard 

 clock for time at the Observatory, and is checked daily by 

 signal from Fort-William Post Office. 



A number of photographs were taken with the Observa- 

 tory camera. 



In very severe weather the storm thermometer in the 

 tower was used for hourly observations. 



The staff of the Observatory consists of : — A. Rankin, 

 J. Miller, R. H. Macdougall, J. O Marr, W. Bee and D. 

 Gordon. The following assisted at times : — J. Affleck, 

 R. Aitken, W. Gentle, H. D. Robb and J. Ford. 



Observations were taken at the Halfway Hut by 

 Messrs. Wedderburn and Aitken during August. 



Hugh M c Kenzie acted as roadman and ticket collector 

 from March till October. 



M c Neil Cameron acted as telephone clerk from 1st 

 July till 30th September. 



PRE ' TED 

 21 JAM-1911 



