Hinks, Arthur R. (Arthur Robert), 1873-1945 · Cambridge : University press · leaf 190
ce ladder incourse of erection. 3. Double tripod scaffold fortheodolite and observer. Recotinaissancc ladder and beacon.Service Geograpliiqiic de PAnnie. Designed by Commandant L. 7Jiira/id,II- Regimen/ dArtilleric. TOPOGRAPHICAL SURVEY 137 a chain should start from one base and close on another.… … Fig. 18. Diagram of Geodetic Triangulation up the Nile Valley from Cairoto Beba. The two heavy lines are bases. Beacons. Beacons are of two principal kinds : the luminous and theopaque. In most countries, when the ray is more than eight ornine miles long it is necessary to use luminous beacons or…
Maps · Surveying
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