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 103
io of equality ; then might thenumber of proportional lines into which c a could be divided, be fo many,that any propofed number might be found among the terms of this feries;and if the number of parts in the circumference was increased in likemanner, then would every term of the proportional… … Tliere may he an almoft infinitevariety of proportional fpirals, andas many different kinds of toga-rithms. Dem. For with the fame equal divifions a d, de, ef, l$c. of the cir-cumference, every variation in the ratio of ca to cb, as of c<z to c h9will produce a different fpiral Aonm. And with…
Navigation · Nautical astronomy · Fortification
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