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Evening Star, Issue 25619, 20 October 1945, Page 10

AUSTRALIAN INVENTS MAP-MAKING MACHINE. Called the Co-graph, after its inventor Lieutenant-colonel H. J. F. Coe, of Malvern, Victoria, the machine has been developed in two forms. One is for use in a trailer attached to a car, and the other is for a pedestrian, being partly carried and partly pushed. Off the " secret " list only a few weeks ago. the Co-graph is quite new in principle but, by a coincidence, an instrument performing a similar function has been developed in tho United States. There has also been some evidence that the Japanese were working on the same principle, but their efforts were crude. Operation of the Co-graph is simple, and any normal person can, with 10 minutes' instruction, produce a traverse worthy of a skilled surveyor—but very much more quickly. The machine at left is the civilian version, that at the right is the army model.