The elements of navigation : containing the theory and practice, with all the necessary tables, to which is added, a treatise of marine fortification ... (1754)
Robertson, J. (John), 1712-1776, Adams, Charles Francis, 1807-1886, former owner. BRL, Adams, John, 1735-1826, former owner. BRL, Boston Public Library) John Adams Library BRL · London : Printed for J. Nourse ... · leaf 83
*; ac =Ybc1 — ab*; ab = Vbc- AC 204. Corol. II. Of all the lines drawn from a given point to a givenine, the perpendicular is the fhorteft. 205. Corol. III. The fhorteft diftance between two parallel rightlines, is a right line drawn from one to the other perpendicular to both. 206. Corol. IV.…
Navigation · Nautical astronomy · Fortification
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