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acres altitude Answer arch base bearing centre chains and links circle circumferentor Co-sec Co-tang column compasses contained cube root decimal diagonal divided divisions divisor draw east Ecliptic edge ExAMPLE feet field-book figure four-pole chains Geometrical series given angle given number half the sum height Hence Horizon glass hypothenuse inches instrument length Logarithms measure meridian distance minutes multiplied natural number natural sine Nonius number of degrees object observed opposite parallelogram perches perpendicular plane PROB proportional protractor Quadrant quotient radius rhombus right angles right line scale of equal Secant sect semicircle side square root station subtract Sun's survey taken tance Tang tangent TDep theo theodolite trapezium triangle ABC trigonometry vane versed sine vulgar fraction whence
Σελίδα 244 - ... that triangles on the same base and between the same parallels are equal...
Σελίδα 229 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 43 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Σελίδα 12 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.
Σελίδα 359 - His method is founded on these three considerations: 1st, that the sum of the logarithms of any two numbers is the logarithm of the product of...
Σελίδα 89 - ... scale. Given the length of the sine, tangent, or secant of any degrees, to find the length of the radius to that sine, tangent, or secant.
Σελίδα 33 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Σελίδα 28 - Then, because the sum of the logarithms of numbers, gives the logarithm of their product ; and the difference of the logarithms, gives the logarithm of the quotient of the numbers ; from the above two logarithms, and the logarithm of 10, which is 1, we may obtain a great many logarithms, as in the following examples : EXAMPLE 3.