Survey of Northeast Greenland. 367 
— the unity, the scale at the north and south frame of the map 
becomes 1 ie) The mean value between the unity and the 
last-mentioned ratio is chosen as the normal scale; it will fit in 
perfectly on the parallels 75°50’ and 82°10’. 
The greatest error in the use of the normal scale appears in 
measurings in east—west along the parallel 79° (ratio of the scale 
<1:10°) and the parallels 741/2° and 83/2? (ratio of the scale 
> 1: 10°). The error may here amount to 0.001639 of the measurings 
in question. In the case of measurings over the whole width of the 
map this error will amount to 0.7 mm, which error is of no practical 
importance in a map of the kind which we are here dealing with. 
The two sheets, scale 1: 1000000, are drawn in such a manner 
that they may be pasted together so as to form one map, which 
comprises the whole distance travelled by the Danmark-Ekspedition. 
The pasting line lies nearly on 78°45’; it is laid down on both sheets 
by means of a fine dotted line in the east and west frames. 
The map 1:500000 is drawn in the cylindrical projection of 
Mercator. The very variable ratio of the scale in this projection has 
necessitated in the map the delineation of a varying scale, the use 
of which will, however, be understood without further explanation. 
A glance at the full map of the distances travelled by the Dan- 
mark-Ekspedition shows how extremely lucky it was, from a geo- 
graphical point of view, that the expedition came to winter in Dan- 
marks Havn (76°46’). In this manner we came to occupy a central 
position in those parts which required the greatest amount of carto- 
graphical work — the stretch from Bessels Fjord to Lamberts Land — 
where many winding small fjords and the abundance of rocky islands 
made it particularly difficult to get a general view and systematic 
arrangement of the cartographic labours. 
North of Lamberts Land the coast line is less complicated, so 
that it was possible to provide a rather complete map by means of 
one colossal effort — a sledge expedition comprising 10 men, 10 sledges 
and 86 dogs, which as far as one of the sledge parties was concerned 
covered a period of from the end of March until the beginning of 
December 1907. The route which the individual sledge parties 
followed during the great sledge trips in 1907 is delineated on the 
two sheets, scale 1 : 1000000, and besides the observation stations 
are indicated by dates as well as by the initials, В (Bisrrue), К (Koch), 
or T (G. THostrup). As far as the observations of HAGEN are con- 
cerned, it has not been possible to indicate the stations, because his 
observation journal from this journey has been lost. The very con- 
siderable part of “Nordost-Gronland, Nordlige Blad”, which 
XLVI. 24 
