362 I. P. Koch. Survey of Northeast Greenland. 363 
from various stations. 
Table of results of leveling 
to 78° N. Latitude. Scale 1 : 500000). 
(See Pl. Ш: Northeast Greenland from 76209 
7 = x ET] Pi : == : x : Pi : Pi DER 
DCE SAS es ST) : | NES ee 3 See 
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s | 82/22) 82 | $2 | £2 | 85 VS så | så | ga 8 | SS | 24 22 ere NS | ge 
Euer Beeren 
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Station Sel Sa [ae | £2 | ee lag | CORRE és és | ee [a | ee] fe [ea] | fel eg SE 
seep ee PES) | В 2) : El a | & 
l= Я |= A A ea) list A Е | IL N a a a a A A A 
SERIES CN NE RIM DRE TS |. о ERE sl oie 3 22,132]: je sans else 
INS | 5.|* Е Sels = #85. = 3.|z TÅ я 2138 ae = El = = = = 
|< | И I I < | < |< ] 4 | |< | < < = < Е: < < = = 
I I | | [| 
W.&L-VIl, inland ice.. | 310\9215| 84 6721900 | | | | | | 887 275 | 
№. &L. VIII, inland ice .. | 300 | 701| 6.1 | fet 824 419! 
Ke anland@ ice: ....... 190 | | 1745 | 65.0 | | | 4 | | | 
K.XI, inland ice........ | 330 | 1705 55.2 | 1947 |68.5 | 1768 |62.2| | 
K.XII, inland ice....... | 440 |1660 48.5 | 1922 158.2 | 1729 51.3) | 
K. XIII, inland ice....... 660 | | 111698| 300/194545 | 1758 [36.2 | 1873 42.2 | | 
K. XIV, Ymers Nunatak.. | 870 | | | 11705 | 23.2 | 1779 130 |1911 35.3 | | | 
B.XXIV, Teufelkap .... | 870 | 2039 |126 1573 |140 | | | ER | | 1930/135.5 | 
B.XXV. SE of Bræøerne | 120 | | | | | | | | | | | | | 979 55.5 1370 68,3 | 1973) 88!) 227 | 34 |599] 46 
B.XXVI, Breserne..... | 160 |2130| 74.5 [1692] 67.6 | 1922 74.8 | 1791 75.6 | |848 65 |690 597 | 901) 78 | 974 32.5 | 1124 44.5 | 139957 |1984 76249 |20 '114844.3 1991 73 | 651| 29 
В. XXVIII, Hellefjord .... | 440 |2058| 92 | 1596 80 | | 1652 78 | |730 86 |636 72.7| 7981102964 55 | 82665 1913| 95228 |41 |.95763 |1950| 86 
B.XXIX, Spydodden.… | 170 | 1) | | |} |718 906 || |1oozlanı | bi ; | 
Established value... |2100 | |670| 1710] 1940| 1770| |1900 800 | 800] |100) | 900 970 | 1000) 1390| 1970| |240 1100 1990 |650 
normal conditions of the terrestrial refraction. The anomalies arise 
from the fact that the ray of light must pass one or more “inversions” 
(for fuller particulars as to this, see chapt. I, Terrestrial Refraction). As 
outward signs of the existence of inversions of this kind we may 
mention the presence of foehn clouds and mirages (see illustration 
in Medd. om Gronl. XLII, Meteorol. Terminbeobachtungen am Dan- 
marks Havn yon ALFRED WEGENER pp. 308—309 and 252—293). The 
inversions do not, howeyer, invariably disclose their presence in 
a visible manner, but may sometimes be recognized by the fact 
that the wind conditions are subject to change during the ascent of 
the mountain. That one may have calm at sea but a fresh breeze 
on the tops of the mountains, is an observation which is very often 
made. Under conditions of that kind one must be prepared for the 
levellings becoming uncertain, and, therefore, the observation journal 
ought to contain notes to guide us in this respect. 
After this it will hardly surprise anyone that there are big 
deviations between the results of the levellings at the same point, 
and that the altitude of the various points is determined with a most 
unequal degree of certainty. 
In order to prevent this fact from lessening the value of the 
indications of altitude on the maps, I have divided the figures of 
altitude into four groups, according to the following rules: 
1. Whenever I had to look upon it as being out of the question 
that the altitude could be encumbered with an error of 10 metres, 
and where the uncertainty would thus only appear in the ones, 
I have expressed the altitudes by figures which do not end in 0. 
On Store Koldewey the highest point is thus given as 971 metres. 
Here one cannot rely on the figure 1, but only on the 7. This, 
of course, does not mean that the ones are quite uncertain; the 
uncertainty will only in very few cases exceed a couple of 
units. 
2. Wherever I have had to look upon it as being out of the question 
that the altitude could be encumbered with an error of 100 metres, 
and where the uncertainty could thus only manifest itself in the 
tens, I have expressed the ones by 0 and the tens by a figure, 
which is not 0. 
3. Wherever the uncertainty amounted to 50—200 metres, I have 
expressed both ones and tens by 0. ' 
