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 55
2 and 3 ; that is, are mixed numbers confut-ing of 2 and fome fraction : And fo of the other Indices. 76. Hereafter the integral part only of thefe Indices, will be called theIndex; and the fractional part will be called the Logarithm : And the com-puting of thefe fractional parts is called the… … ARITHMETICK. 35 j j. To find the Logarithms of prime numbers. Rule, ifr. Let the fum of the propofed number and its next leflernumber be called A. 2d. Divide 0,868588963 by A, referve the Quotient. 3d. Divide the referved Quotient by the Square of A, referve thisQuotient. 4th. Divide the lafr.…
Navigation · Nautical astronomy · Fortification
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