Maps and map-making; three lectures delivered under the auspices of the Royal geographical society (1910)
Reeves, Edward Ayearst, 1862-1945, Royal Geographical Society (Great Britain) · London, The Royal geographical society · leaf 58
Fig. 46.—Old Surveying■ Compass. (From Laussedets Recherches surles Instruments, etc.) INSTRUMENTS 39 … Fig. 47.—Prismatic Compass. The graphometre of Danfrie bad also a compass in thecentre, which would givethe magnetic bearing of any pointon the survey made with this instru-ment. I must not go further intothe development of the compasshere, but will merely show (Figs.47, 48) two of the latest forms…
Cartography · Surveying
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