230 I. P. Косн. 
If we further take it for granted that the altitude of the stations 
given at an estimate in the preceding is correct, as well as that R 
may be put at 6300 kilometres, we get the following for the computa- 
tion of dk: 
У УТ VIII IX X 
H' (fixed value) .. 88.0 971.0 394.0 177.0 426.0 
dH’ (kilometre) .. —- 0.0019 — 0.0062 > 0.0020 -- 0.0012 —- 0.0021 
0? (kilometre).... 86 138 196 85 225 
(| ae er AL а SYNE +03 el + 0.1 + 0.2 + 0.1 
In the case of the points III and VII the computation has not 
been performed, because the distances to it have been too short to 
permit of ascribing to the error of the refraction constant a pre- 
dominant significance as compared with that of the other sources of 
errors. 
From the results it appears that dk may be estimated at + 0.1 
to + 0.3. 
The table on p. 227 is computed by k — 0.1396, whereas the 
value of k corresponding to the conditions during the levelling at 
Station XII according to the computation just given has been two 
to four times greater. 
The triangulation net at Dove Bugt. 
Immediately after his return from the great spring sledge trip in 
1907 Bıstrup started a careful geographical charting of the regions 
in and around Dove Bugt. The basis of this survey were the po- 
sitions of the cairns VI, VII, VIII, IX and X, determined by means of 
triangulation in the autumn of 1906, the latter making the foundation 
of a series of trigonometric station pointings round Hvalrosodden 
(walrus point), Sælsøen (seal lake) and on Teufelkap (Devil's cape). 
Thus we are not dealing with a systematic triangulation in Dove 
Bugt. At the computation, however, it turned out that there was 
everywhere a control on the measurements except at Station XXIII 
and so it became possible to compute, in a satisfactory manner, 
the geographical co-ordinates of Haystack, and to get a means to 
compare the two determinations of longitude in Danmarks Havn and 
Germania Harbour, to which comparison, after the problem of the 
movement of continents has arisen'), a certain interest has become 
attached. In view of this I shall in the following publish the 
necessary data for the carrying through of the computation of the 
co-ordinates of Haystack. 
1) See: Petermanns Geographischen Mitteilungen, April 1912: “Die Entstehung der 
Kontinente”, von Dr. ALFRED WEGENER, and Samlung Vieweg, Heft 23, 1915: 
“Die Entstehung der Kontinente und Ozeane”, von Dr. ALFRED WEGENER. 
