1898.] 



BEN NEVIS OBSERVATORY. — INSTRUMENTS, ETC. 



93 



INSTRUMENTS, ETC., 1898. 



During the year the following instruments have been 

 in use : — 



Barometer — No. 1385. 



Thermometers— Dry Bulbs, 192677 and 535541 ; Wet 

 Bulbs, 192672 and 535541; Max., 117293; Min., 116918 

 and 11 08531 A. ; and occasionally the Storm Thermometer 

 in the Tower. 



Up till the 9th of June, and since the 26th of November, 

 the thermometers were exposed in the small pattern of 

 Stevenson Screen on the ladder stand (No. 2), and 

 between these dates in the large screen 4 ft. above the 

 ground. 



Richard's self-registering Aneroid Barometer has been 

 in use throughout ; also Campbell-Stokes Sunshine 

 Recorder, Robinson's Anemometer — in summer only — 

 Hilger's Pocket Spectroscope for Rainband. 



The large Dust Counter and the Camera have been 

 used occasionally. 



The same pair of 5-inch raingauges have been in use 

 summer and winter. 



The depth of the snow has been measured at Post A. 

 throughout. 



The Anemograph Clock continues to be the Standard 

 Clock for time at the Observatory. It is checked every 

 morning by time signal from Fort- William Post Office 

 at 10 h . 



Communication with Low Level Observatory and Post 

 Office has been maintained by telephone — the instrument 

 giving every satisfaction. 



The Mid Station was open in July and August, when 

 observations were made by Messrs Muir, Irons and Aitken. 



The Regular Staff of the Observatory has been A. 

 Rankin, J. Miller, R. H. M'Dougall, D. Grant, and J. 

 Neil. From March till October D. M'Kenzie acted as 

 Roadman and Ticket Collector. 



The following have assisted at various times, viz : — 



Messrs J. S. Begg, D. Wilton, W. Bartlet, A. Aitken, 

 and A. Hunter. Messrs D. M'Gillivray and D. Fraser 

 acted as clerks in charge of the telephone during July, 

 Au«ust, and September. 



The outside woodwork of Observatory has been all 

 painted ; part of building recovered with new tarpaulin ; 

 and in the Tower the ladder and flooring have been 

 repaired. 



TRANS. ROY. SOC. EDIN. — VOL. XL1V. 



