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 107
ans, such as by chronometer or telegraph signal,know the time of another place at the same instant when hisobservation for local time is observed, he has found thedifference of longitude between the two places. There are quite a number of ways of finding local meantime, both by the sun and stars,… … Fig. 89.—Finding Time from Altitude of Sun. SURVEY METHODS 89 on the horizon of a man on the earth beneath the pointZ. Let the circle NESW represent the horizon line, Zthe observers zenith, P the north pole, EQW the equator,QZ the latitude of the place of which ZP is the complement,X the sun, PX…
Cartography · Surveying
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![An illustration from Sidereus nuncius : magna, longeque admirabilia spectacula pandens, suspiciendaque proponens vnicuique, praesertim verò philosophis, atq[ue] astronomis, quae à Galileo Galileo ... perspicilli nuper à se reperti beneficio sunt obseruata in lunae facie, fixis innumeris, lacteo circulo, stellis nebulosis, apprime verò in quatuor planetis circa Iouis stellam disparibus interuallis, atque periodis, celeritate mirabili circumuolutis; quos, nemini in hanc vsque diem cognitos, nouissimè author depraehendit primus; atque Medicea sidera nuncupandos decreuit (1610)](https://img.insideoutlibrary.com/img/200/ia-sidereusnunciusm00gali-31-11.webp)
