WHOEVER would seek the origin of things that in countless ways control mankind begins an arduous task. One can readily tell when the radio, motion picture, airplane, or automobile appeared, for he well remembers the time he saw the first of these or at least can talk with people who saw the first ones. But it is more difficult to imagine the days when the internal-combustion engine was produced…
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For twenty years I have been fighting to impress upon publishers, authors and cartographical draughtsmen the need and value of clear maps in text-books. I became an historical carto- grapher largely because so many of the maps I saw in books and atlases were difficult to under- stand. Maps are visual aids: they do not supersede text-books. What are required are simple, clear drawings that one c…