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Published online by Cambridge University Press: 24 August 2017
* The colouring of the original map is as follows :—Main roads are bright red with side lines (subsiliary roads uncoloured), woods bright green, ground relief natural grey, water blue, large towns red shading, villages red circle. In the reproduction, red comes out black, green appears grey, and grey is almost invisible. A very large number of conventional signs are used to show details such as aerodromes, landing places, &c, &e. These can only properly be studied on the original map (in the Library of the Society).
The general effect of the original map on the eye is irritating, owing to the violently contrasted colours used. This, combined with the number of fine lines appearing, is likely to lead to considerable eye-strain if continued study of the map is required. The English map, also reproduced, is much superior from this point of view.