292 I. P. Koch. 
a southerly or northerly direction. The direct connecting of station 
to station in this manner is only rarely possible during forced sledge 
trips; the station must, as a rule, be selected immediately at the 
camping site on the sea ice or on the low-lying foreland, and so it 
cannot be pointed from the subsequent station. On the other hand 
it was very often possible in Northeast Greenland to make use of 
rocky knolls on projecting points and headlands, easily discernible 
rocky holms and finally also high, clearly defined mountain peaks, 
which might be visible during several marches. While travelling 
north I paid particular attention to the choice of points thus suitable 
as points of support for the determination of position. By determining 
the direction at these points from the varions stations, I succeeded 
in reality in establishing the connection, by means of azimuth, all 
the way from Rekvedgen (drift wood island!) to Amdrups Land, 
80°43’. Past the Nordost-Rundingen, where the ice free land only 
consists of a narrow strip of gravel, and where the nunataks do not 
penetrate the inland ice, the azimuth connection failed for the first 
time; so the longitude of Nordost-Rundingen and Nakkehoved are 
determined by the watch, with a rather safe control through courses 
and distances from Amdrups Land. On the voyage across Wandels 
Hav the camping sites were determined by latitude in connection 
with an azimuth at Nakkehoved. On May 5th Nakkehoved was seen 
for the last time, but not until May 6th was Peary Land sighted. 
On the voyage across Wandels Hav the connection thus failed a 
second time. The position of Peary’s Cairn is, therefore, also deter- 
mined by the watch. My determination of the longitude of Peary’s 
Cairn coincides closely with that arrived at by Peary himself; on the 
other hand the latitude, as observed by me, deviates by a couple of 
minutes from that given by Peary. 
At the great majority of stations the longitude was geometrically 
determined by azimuth and latitude on the map, but everywhere the 
watch was used as a means of control. The deviations between the 
results of the two methods hardly ever exceeded a couple of kilo- 
metres and often only amounted to a few hundred metres. One 
may thus take it for granted that on the two occasions where the 
azimuth connection failed, and the determination of longitude conse- 
quently became exclusively dependent on the watch, no error of 
practical importance has been introduced into the map. As far as the 
т) Rekvedgen, the latitude of which was directly observed by myself in 1906, was 
by Bıstror, in the course of the triangulation work at Dove Bugt, connected by 
azimuth with Cairn XXIII on Moskusoxefjældene, which cairn was in its turn 
by means of the network of triangulation connected with the Observatory at 
Danmarks Havn. 
