The American practical navigator : being an epitome of navigation and nautical astronomy (1888)
Bowditch, Nathaniel, 1773-1838, United States. Navy Dept. Bureau of Navigation, Cooper, Philip Henry, 1844-1912 · Washington : Govt. Print. Off. · leaf 176
r within this small circle the zenith distance would be smaller, and to an observer w ithout the small circle the zenith distance would be greater than that observed; hence 00 is a circle of position, onsome point of wliose circumference the observation was made. If, then, the Navigator can project… … Fig. 68. alone or his longitude alone: since one of the latter elements only determines a point to be in a certain circle, with-out fixing upon any particular point of that circle.—Chauvenet. Now, suppose at t e same instant of time (Fig. 68) another body was cLserved r.t s vertical to A, ilic…
Navigation · Nautical astronomy
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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-266-171.webp)
