Survey of Northeast Greenland. 313 
perform on their journey in a southern direction from the Mallemuk- 
fiældet (89°09’) and Amdrup's Land (80°43’). 
This general map, however, also played a great part in another 
direction, inasmuch as it saved us the trouble of computing the 
determinations of time during the journey itself, because on this map 
we were able to determine our position by construction through 
azimuth and latitude. 
The interest which all my comrades took in my map sketching, 
according as it grew on paper, day by day, made me realize that it 
also was of a more general importance. This instantaneous and in- 
telligible result of our laborious journey gave us all the immediate 
feeling that we were serving a useful purpose, as long as we came 
to new regions and saw what no one had ever seen before. It 
stimulated us and imbued us with a strong desire, not only to pene- 
trate further north, but also, during the return journey, to be able 
to fill up the numerous gaps in the sketch, which were an inevitable 
consequence of our forced journey in a northern direction. 
Map of the single tracts. 
Whereas the general maps may be of importance on very long 
journeys, it will, I suppose, be practicable as a general rule to 
sketch a map on a larger scale, also in the case of journeys extending 
over a shorter period. The means required for this purpose are few 
and simple: compasses, a pencil, chequered paper and a protractor, 
which latter may also be used as a rule. Perhaps it may also be 
expedient to use a logarithm table or an engineer’s scale; however, 
for my part, I never found occasion to do so on the Danmark- 
Ekspedition. 
It is of no use to carry a carefully drawn geographically net- 
work. The squares in the paper serve as a network, in that one only 
takes care that the proportion between minutes of latitude and longi- 
tude at a rough approximation becomes like = In my sketch 
map from Peary Land (see Plate VII), extending from 82° to 83°30’ 
one degree of longitude occupies three squares, whereas a degree of 
latitude covers twenty. Here the proportion = is estimated at z 
which in reality corresponds to ф = about 81°30’. It was the purely 
practical circumstance of my thus getting three degrees of latitude 
on each square, which contributed towards the establishing of the 
proportion ay but I am quite willing to admit that it would have 
been still better, if I had chosen the proportion = corresponding to 
ф = about 82°50’, in which manner two squares would here have 
stood for five minutes of latitude. 
