Survey of Northeast Greenland. 217 
The triangulation net proper. 
In the sketch Fig. 29 of the net of the triangles, the usual 
manner of drawing is adopted. That the side VII—X is drawn in a 
full line thus means that Cairn VII has been pointed from X, and 
that also Сато X has been pointed from УП. On the other hand 
the presentment of the side X—XII indicates that Cairn X has been 
pointed from XII, whereas Cairn XII has not been pointed from X. 
It thus appears direct from the figure that no measurements have 
been made at the stations VI, XIII and M (Maroussia). Otherwise, 
as in the case of the base net, the triangles through which the 
progressive computations are carried have been drawn with a 
heavier line. 
The side of departure (i. e. the side from which the computations 
start) is the side III—IX, computed through the base net, for which 
log III—IX = 3.64309 has been found. For the computation of 
triangle IX—X—XI, however, IX—XI is made to form the side of 
departure. 
The manner in which the triangles were divided into groups 
during the computation appears from the following: 
The quadrangle II—IX—VII—XII. 
Triangle III— VII — XI Triangle HI—VII—XII 
Ш 86°37’54” - 10” Ш 68°18'56” + 00” 
УП 41 2222 --10 VII 54 0934 +10 
XI 52 0014 — 10 XII 57 3119 +01 
180°00'30” + 30” 179°59’49” + 11” 
Triangle HI—IX— XII Triangle VH—IX— XI 
Ш 154°56’50” + 10” VII 95°31’56” + 00” 
IX 13 2352 +11 IX 38 3622 +01 
XII 11 3949 —- 10 XII 45 5130 +11 
180900'31” + 31” 119°59'48" + 12” 
Triangle III—IX — XII which was of course not to be used for 
the computation, was included in view of the regulation of the angles. 
In this regulation proper allowance has been made for a remark in 
the observation journal, which mentions as doubtful whether at the 
measuring of the direction VII—III it was really Cairn Ш that was 
pointed. This was, however, as indicated by the sum of the angles 
clearly the case. 
The computation of the triangle gave as a control log IX—XII 
u As there was some likelihood that the former value was 
\ 3.96428° “*S > x у У 
the best, log IX—XII was fixed at 3.96425. 
