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 40
Fig. 22.—Campbells Sextant. Fig. 23.—Modern Sextant. number of readings, errors in centring and graduation would be eliminated. A better form of reflecting circle was designed by Borda, in France, in 1775 (Fig. 24), / and this, with few modifica- / tions, has been extensively ij used, although now…
Cartography · Surveying
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