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 50
have been made in the design ofthe instrument for about eighty years. Here, Fig. 37,is an interesting old sketch, taken from Digges book,showing his theodolite in use for rinding the distance of aship. It is an interesting fact that the theodolite, doubtlessthe most important instrument for all… … Fig. 37.—Digges Theodolite in use. gradually improved upon his idea ; but it was not until thelatter part of the eighteenthcentury that this instrumentcould really be called an accu-rate instrument for geodeticwork. It was then that Eams-den, the ingenious instrumentmaker, constructed his…
Cartography · Surveying
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