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 43
now at the weight and size of atheodolite with circles of only 5 or 6 inches in diameter, butwhat would he say to carrying about an instrument of thiskind ? Picards idea was, of course, to give greater accuracyto the readings, but difficulties arose with this unwieldyinstrument which do not seem to… … Fig. 29.—Old Quadrant. INSTRUMENTS 25 was made of iron, and the limb bearing the quadrant wascovered with copper. It is interesting to note that we havehere at this date the firstintroduction of the tele-scope, with spider lines inthe diaphragm, attachedto angular measuring in-struments, for…
Cartography · Surveying
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
