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 51
Theodolite. 32 MAPS AND MAP-MAKING in India, has now been placed on the retired list, and given apermanent home at the Ordnance Survey Office. Doubtlessmany of you have lately had an opportunity of inspectingthis famous old instrument at the Franco-British Exhibition,where it stood in a glass case… … Fig. 39.—5-inch Transit Theodolite. be read to single seconds. The vertical axis is about twofeet above the circle. The telescope has a focal length ofthirty-six inches, and a transverse axis of two feet in length,terminated by cylindrical pivots, about which, when sup-ported above the axis of the…
Cartography · Surveying
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