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 79
triangles congruous. A B 33 E Dem. Apply the point d to a, and the line de to ab. Now as de = ab (by fup.); therefore the point e falls on b. And as £_ d =Z. a (by fup.) therefore the line df falls on ac Now if the line ac is lefs or greater than the line df ; Then the line fe not falling on cb,…
Navigation · Nautical astronomy · Fortification
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