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 109
in equal parts of the radius (270)So is the arc of one minuteTo the eorrefponding parts of the radius So thaj for the fine of one minute, may be taken. 0,0002908882 21600 6,283185 0,0002908^2 221 ss TRIGONOMETRY. 321. PROP. IV. In a feries of arcs in arithmetic progreffion, the fine of any one of… … De m. For in a circumference whofe cen-tre is c, and diameter ab, let there betaken a feries of arcs, arb, ard, are,arf, arg, arh, &c. whofe commondifference is the arc bd. Then drawing the chords ab, ad, j^ ae, af, ag, ah, &c. their halves will be the fines of half the arcs arb, ard, OV.…
Navigation · Nautical astronomy · Fortification
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
