Survey of Northeast Greenland. 209 
The starting point of the levellings was the zero of the 
tidal gauge of the expedition near the ship. From here the levelling 
was carried on during the last days of September across the ice to 
land, by means of a Stampher levelling instrument with horizontal 
sights from the middle. After that the levelling was carried on in 
a loop by the Observatory and both of the termini of the base. The 
result was: 
The Observatory, the brass bolt in the surface of the granite pillar 13.46 m 
The western end of the base, the brass bolt............... 14.27 - 
The eastern end of the base, the brass bolt ................ 11.26 - 
The triangulation 1907—08. The many sledge trips under- 
taken in the course of the autumn of 1906 and the spring of 1907 
had gradually given us a fair knowledge of the lay of the land, and 
further it had made rather clear to us what tasks lay before us, and 
how they ought to be tackled. The intricate belt of rocks in Dove 
Bugt made it desirable to extend the triangulation net towards west, 
aiming at the same time to go south with the network as far as 
Haystack. This point had been determined by triangulation by the 
Germania-Expedition in 1870, and we might thus, if the connection 
with Haystack was established, benefit by the excellent determination 
of longitude made by the Germania-Expedition in the Pendulum 
Islands. 
During the great sledge journey undertaken in the spring of 
1907 we succeeded in keeping up the connection by means of azimuths 
from station to station, all the way from 77°15’ (the northern part 
of Germania Land) to 80°43’ (Amdrups Land), so that the determinations 
of longitude on this long coast became practically independent of 
our watches. On the other hand this connection by means of azi- 
muths was lacking on the comparatively short distance from Dan- 
marks Havn to the northern part of Germania Land, and for this 
reason among others it was desirable to carry the triangulation net 
in a northern direction along the outer coast of Germania Land as 
far as Kap Marie Valdemar. 
The circumstance that MyLius-ERICHSEN and his sledge party 
were lost’) caused, however, a very great modification in these plans. 
') This disaster meant a very serious loss to the survey work. I lost HAGEN, who 
was exclusively at my disposal. В. THostrup, who after MyLius-ERICHSEN took 
charge of the ethnographic work, had only comparatively little time to spare 
for surveys. G. THOSTRUP and LINDHARD, in the autumn of 1907, went north 
with six sledges in order to search for MyLius-ERICHSEN, in which manner I 
was deprived not only of my staff, but also of dogs; and finally I went north 
myself, in March 1908, in order to try to obtain news of our missing com- 
14* 
