Crocker's Elements of land surveying. To which are added, Tables of six-figure logarithms, superintended by R. Farley

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1841
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Page i - CROCKER'S ELEMENTS OF LAND SURVEYING. Fifth Edition, corrected throughout, and considerably improved and modernized, by TG BUNT, Land Surveyor, Bristol. To which are added, TABLES OF SIX-FIGURE LOGARITHMS, &c., superintended by RICHARD FARLEY, of the Nautical Almanac Establishment.
Page 4 - ... one less than the number of figures in the integral part of the natural number. The decimal part...
Page 8 - The logarithm of the quotient of two positive numbers is found by subtracting the logarithm of the divisor from the logarithm of the dividend. (6) The logarithm of a power of a positive number is found by multiplying the logarithm of the number by the exponent of the power. For, N" = (oT)
Page 125 - Or, from 8 times the chord of half the arc, subtract the chord of the whole arc, and $ of the remainder will be the length of the arc, nearly.
Page 63 - If a side be required, say, — As the sine of the given angle is to its opposite side, So is the sine of either of the other angles to its opposite side.
Page 274 - Two or more places are on a true level, when they are equally distant from the centre of the earth. Also, one place is higher than another, or...
Page 133 - This figure being a mean proportional between its circumscribed and inscribed circles, that is, equal to a circle whose diameter is a mean proportional between the axes of the ellipse, we...
Page 105 - From half the sum of the three sides subtract each side severally. Multiply the half sum and the three remainders...
Page 42 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Page 124 - To find the area of a sector of a circle. RULE I. — Multiply the radius by half the arc of the sector for the area.

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