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 67
strument—asort of modification of the graphometre—which he calledthe Trigonometre: it was really a sort of range-finder, andconsisted of three movable arms. Sighting along the base-line at one station, one of the arms would be set on to adistant point, and then, taking the instrument to the… … ^ Fig. 55.—Infallible used vertically. In an old manuscript book on surveying, in my posses-sion, by J. Douglas, dated 1724, is described an early form of plane-table, which the authorcalls the Infallible (Fig.54). There are, in this book,some striking drawings ofexamples of using this in-strument,…
Cartography · Surveying
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
