Survey of Northeast Greenland. 149 
responding observations in the Observatory and continued for five 
minutes longer. With the permanent instrument in the Observatory 
observations, in each case, were made for about fifteen minutes, thus 
with the small instrument for about twenty-five minutes. 
The position of the small instrument in relation to Cairn X was 
determined by the following elements: 
Oblique distance from instru- 
ment to the centre of wooden disc 
4.69 m. 
Zenith distance of the centre of 
the wooden disc from the instru- 
ment 45°59’. 
Angle X-Instrument-Cross (K) 
164°41". 
Og 
Fig. 9 shows, in a horizontal Fig. 8. 
projection, the reciprocal position 
of the Observatory, Cross (K); Cairn X and the small universal 
instrument (I). 
In the figure are given: 
ОХ = 7494.5 m. 
OR 215: ne 
17% 4.697510 45-69 .— 13.37 m. 
<X—O—K = 50°11’.5. 
Ne IG 1 
For < 1— О — X we get < О = w Е sin 164541’ — about 24” 
7494 
— about 0’5. 
LTD K 
ig si 
J = 
Fig. 9. 
KE LOI: OE = OK cos 50°12' = 9.72 т; КЕ = OK sin 50°12’ 
ELEG ва. 
11.67 
7404.5 972854 
From A KIOweget< I gee — about w 
IE 
— 5227 — "about 5'.5. 
From Л OXI we get < X == 180° — (164°46'.5 + 0'5) = 15°13' 
from which in its turn, ID being vertical on ХО 
Хи 613 — 3.25 m. 
LOS О XD 7491 2m. 
