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 672
ks, as fuppofe 50 yards; draw the per-pendiculars ac, bd, of 18 feet each, and draw the faces bc, ad. From the faliant angles a, b, draw the flanks ae, be, at right anglesto the faces, and the mafter llrie aebfae will be conffructed. Make a rampart, parapet and foot-bank; ramps in the curtinfff… … t-$»wr*rJts=:==SJfcx f7^f*iffl?fy<t ocu^i ^a^y&^/f. Mar in! fortification. 6z$section iv. Of the Fortifying of Towns; Towns are fortified hy furrounding them with a rampart^ moat andoutworks. 73. The Rampart of a town is a large bank of earth furroundingthe place, of a height fufficient to…
Navigation · Nautical astronomy · Fortification
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