192 1. P. Kocu. 
21/X 1907, forenoon. Observer and assistant: Косн 
Commenced at 8225, 
finished at 9225. 
Sunrise about 8245 
Cover of clouds: 3° a-str.; wind: light easterly, after that calm. 
b, = 765.7 (+ 13.9)!); £, = + 20.5; moisture 77 Io. 
b, = 764.6 (-|-. 12.2); Ё = - 20.3; moisture 78 lo. 
Glimmer’): 0, on the “Skerry” 0—1. 
Mirage"): 0. On Store Koldewey upward mirage; seen from the ice 
and from the “Villa” downward mirage on the “ЗКеггу”. 
Vertical movement: 3 оп У, X and the “Skerry’’, 2 on IX. 
In the crow’s nest at 8245: t = — 20.0; calm. 
On the ice: t— — 20.6. 
In the first set a great rising of Store Koldewey, so that Cairn V 
had the country as a background’); in the second the country was 
again lowered so that Cairn V and the greater part of the knoll on 
which the cairn was situated, had the open air as its background. 
The difference between the altitude of the hinterland in set I and II 
was about 2!/2’ to 3’, measured at an estimate by the interval between 
the horizontal threads. 
Az. 
N ET -- 24”.0 (value extremely low). 
Te en aa — 7”,9 (value strikingly low). 
ICS AP EE re + 12”.4 (value rather low according to the season). 
The “Skerry”.... + 34”.1 (normal value according to the season). 
at 9230 Horizon II + 144” (value strikingly high). 
- в AT 5 
The levellings indicate a very low value of |, immediately above 
the sea ice. However, already in the line of vision at the “Skerry”, 
dr À р 
dh ?S normal according to the season and thereafter increases very 
strongly up to the highest line of vision. The strong vertical move- 
ment in all objects indicates a marked stratification in the atmosphere. 
The measurings of temperature on the ice and in the crow's 
nest show a rather normal rise in temperature in the lowest 30 m, 
which may tally with the normal zenith distance to the “Skerry”. 
The low value of a, im the line of vision at the sea horizon is, in 
the case in question, controlled by means of the downward mirage, 
as seen from the “Villa”. The height of vision at the last-mentioned 
1) The temperature of the mercury. The two readings correspond to the beginning 
and cessation of the observations. Glimmer and mirage were recorded, like 
vertical movement, at an estimate in four intensities. 
*) See Fig. 17 which corresponds to the condition during the observation at 1P30. 
