The hills are shown by contours at intervals of 10 or loo ft.
At the same time it cannot be denied that these maps, unless the contours are inserted at short intervals, lack graphic expression.
The Mississippi river is skirted throughout the length of the state by contours of 400 to 600 ft.
If they were Semitic speakers, the present facial contours of the northern Semites, which have spread all over the world, are not Semitic at all: for the Egyptian Armenoids in the statues of the Old Kingdom look like Europeans, and must have been of " European " blood.
They are printed in three colours, contours at intervals of 10 and 20 metres being in brown, incidental features (ravines, cliffs, glaciers) in black or blue.