Elements of surveying and navigation : with a description of the instruments and the necessary tables (1847)
Davies, Charles, 1798-1876 · New York : A.S. Barnes & Co. · leaf 79
74 ELEiMKxNTS OF SURVEYING. 6. From a station P there can beseen three objects A, B and C, whosedistances from each other are known :viz. AB = SOO, JlC = eoo, and BC==400 yards. Now, there are mea-sured the liorizontal angles .5PC = 33o 45 and BPC=22° 30:it is required to find the three… … r P^ = 710.193 yards.Ans. ^PC= 1042.522r P^ = 934.291 OF MEASUREMENTS WITH THE TAPE OR CHAIN ONLY. 92. It often happens that instrmnents for the measurementof angles cannot be easily obtained; we must then relyentirely on the tape or chain. We now propose to explain the best methods of…
Surveying · Navigation
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-67-45.webp)
