242 1. P. Косн. 
In the preceding I have under the computation of the triangulation 
network of 1906 given the error of the sum of the angles in the case 
of twenty-five triangles. Upon an average this error is 13”; all the 
errors in the sum of the angles vary between + 27” and — 31”, and 
they are rather evenly distributed on both sides of zero. After this 
one must admit that some few angles may have an error of as much 
as |3 minute. 
Now it must be borne in mind that the two stations from which 
the position of Haystack is directly determined have an extremely 
simple connection with the Observatory 
O—X, X—XXII and 
О—УШ, VIN— XXIV. 
The co-ordinates of the two stations, XXIII and XXIV, are com- 
puted through these sides with a controlling computation respectively 
through 
О—УШ, УШ—ХУ, XV—XXII and 
O—V, V— VI, VI—XXIV. 
The possibility of a considerable accumulation of errors is thus 
excluded. If we presuppose that the azimuth XXIII—Haystack has 
an error of 2’, we are at the limit of what is practically possible; 
but hereby there would, on the longitude of Haystack, arise no 
greater error than 80—90 metres (the side XXIH—Haystack is about 
143000 m). That an error of this kind does not exist is shown by 
the controlling sight XV—Haystack as well as by the azimuth deter- 
mined at Station XXIV by means of an observation of the sun (as 
to this see the section “The geogr. survey of Dove Bugt”. 
It appears from the preceding that the sources of error given 
are neither singly nor collectively sufficient to suggest an explanation 
of the difference of about 1190 m which exists between the positions 
of Haystack, as determined by the Danmark-Ekspedition and the. 
Germaniaexpedition. The only source of error, which in this connection 
plays any part, is the astronomical determination of longitude. But 
in order to explain the deviation through the error of the longitude 
of the Observatory we must put the actual error of the astronomical 
determination of longitude at four to five times the mean error, 
which is perfectly absurd. 
We have finally to make an examination of the observations of 
the Germaniaexpedition. 
The base measurement and triangulation of the Germaniexpe- 
dition with appurtenant astronomical determinations have been per- 
formed by the trained astronomers and geodetists C. BORGEN and 
