488 
NATURE 
—_- 
[March 22, 1883 
shelter from the piercing cold and storms. The baro- 
meter, a fine Fortin, had been left in its cairn built up 
during the past winter; and great labour was expended 
before the north side of the cairn was reopened, the 
stones being so hard frozen that a crowbar had to be 
employed. The instrument was found in good condition. 
Passing over all other details of arranging the stations 
and fixing instruments, I may say that I had all in order 
and commenced work on June I. I now give a list of the 
stations, with positions, hours, and elements of observa- 
tion.! The distances in the text are given in right lines 
from the sea-level station. Fig. 1 at once shows the 
bearings, and distances by the actual track followed. 
Fig. 2 is a longitudinal section giving total actual 
distances. ¥ 
ACHINTORE, FORT WILLIAM, BASE OR SEA-LEVEL 
OBSERVATORY.—-/osition : About 28 feet above sea, on 
a level sward, perfectly open on all sides, running parallel 
aus immediately adjacent to Loch Linnhe; soil, gravelly 
oam. 
Hours.—5, 5.30, 6.15, 7, 7.30, 7-55, 8.30, 9, 9.30, 10, 
10.30, 11, and 11.30 a.m. ; and noon, 0.30, I, 1.45, 2.30, 
3, 6, and 9 p.m. 
Elements.—Atmospheric pressure by mercurial baro- 
meter, temperature of air and evaporation (dry and wet 
bulbs), direction and force of wind, kind and amount of 
Se. LIVINGSTON'S BOULDER 
/ STATION 840 FT z 
oe ‘ r 
@ PEAT MOSS Sect 
“STATION 40 FT No 
An 
Se 
VA 
Bie.) 
2 
Fin 
/ a 
THE LAKE STATION 
2S. x 1840 FT 
nm x 
= Peas HORSE LEFT HERE 
‘8 
a @ BROWN’S WELL 
i) 7 * STATION 2200 FT 
8 / ACHINTORE, FORT WILLIAM \a Hs 
Vv ___BASE STATION. on 
os << au 
Sse STATION @ RED BURN CROSSING 
—— t "2700 FT 
“Ses Pax ee ”, 
FMNG pe ’Of>._ BUCHAN’S WELL 
‘—adce ae STATION®... 357577, 
} SANs iit ut 
= BEN “NEVIS 
| MILE a 7 4 SUMMIT STATION 
aT Ss » Arm 406 FT 
FURLONGS — 7h, 
Fic. ; 
3 
BUCHANS WELL 
STATION 2 
THE LAKE STATION \ 357542 
gia 1 BEN NEVIS 
! reo surRN ' SUMMIT STATION 
i CROSSING STN. a | 4406 FF 
LIVINGSTONS H l 1 2700F! ! H 
I aN! | BROWNS WELL\ i 1 
ACHINTORE 1 fe Sue ' pLareau 
BASE STATION PEAT MOSS : \ | iJ H H OF STORMS 
ery =e L | MEALL ANT- | HY i s 
MEALL ANT- 4 eee 1 SUIDHE | i y 
SLAMAIN H 1 | esFery Dr» a gy 
' 1 ene: VE YS Be y 
' ! SZ ie ¢ j 
pee ear YM iE, 
3M.GF. 4M.6F. 5M.2F. 5M.GF, 6M. 2F. 
SS 
FURLONCS 
Fic, 2. | 
cloud, and movements and velocities of the various strata 
of cloud, hydrometeors and remarks in full detail at all 
the above times. Maximum and minimum shade tem- 
perature, solar maximum and terrestrial minimum tem- 
perature, earth temperature (1 and 2 feet), and rainfall at 
ga.m. and 9 p.m. Temperature of Achintore well, and 
subsequently of Loch Linnhe between 9 and II a.m. 
Ozone for periods of 4 hour, 1 hour, 14 hour, and 2 
hours between 9 and 11 a.m.; also for periods of 24 
and 12 hours, ending 9 a.m. and g p.m. Ozone also for 
the following periods of exposure .—6 hours ending 1 
p.m., and 18 hours ending 7 a.m., and subsequently in 
addition for 15 hours ending 5.30 a.m., and 9 hours ending 
- Cloud movements and velocities were not, however, [noted atsolutely 
ery time. 
2.30 p.m. [It will be seen later that all these ozone ob- 
servations (except those for 12 hours ending 9 o’clock) were 
simultaneous with others on the summit of Ben Nevis, at 
the Lake, and Peat Moss stations. ] | 
Actinism of the sun’s rays and of daylight by Dr. 
Angus Smith’s apparatus for 24 hours ending 10,17 a.m. ; 
comparison-pressure by aneroid at 5 a.m. and 3 p.m. on 
leaving for and returning from the summit and slopes’ 
stations. 
PEAT Moss.— Postion : About 40 feet above sea; 
2m. 2f. ; perfectly open ; near the middle of the extensive 
moss at the foot of AZeall an ¢t-Suidhe; peaty, swampy 
soil, with hummocks around. 
Hours.—5.30 to 6 a.m. (this was the only- hour in the 
entire system that varied, and extra simultaneous reat | 
