The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skillful Practice of this Art |
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... Scale , and other Mathematical drawing instru- ments , used by surveyors . The fifth section contains Plane Trigonometry , right angled and oblique , with a variety of rules and practical examples . The first section ( Part the Second ) ...
... Scale , and other Mathematical drawing instru- ments , used by surveyors . The fifth section contains Plane Trigonometry , right angled and oblique , with a variety of rules and practical examples . The first section ( Part the Second ) ...
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... - sets 5. Method of survey- ing by Intersec- tions 282 Semidiameter of the Sun ibid . Transit of Pole Star 176 Difference of , Altitude of 289 Pole Star and Pole 177 6.Changing the scale of Maps Sun's Declination 178 295 Reduction Table ...
... - sets 5. Method of survey- ing by Intersec- tions 282 Semidiameter of the Sun ibid . Transit of Pole Star 176 Difference of , Altitude of 289 Pole Star and Pole 177 6.Changing the scale of Maps Sun's Declination 178 295 Reduction Table ...
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... , or two , or three eiphers to it : and that any number of ci- phers , before an integer , or after a decimal frac- tion , has no effect in changing their values . SCALE OF NOTATION . Integers . 7 3 4 2 DECIMAL FRACTIONS . 3.
... , or two , or three eiphers to it : and that any number of ci- phers , before an integer , or after a decimal frac- tion , has no effect in changing their values . SCALE OF NOTATION . Integers . 7 3 4 2 DECIMAL FRACTIONS . 3.
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Containing All the Instructions Requisite for the Skillful Practice of this Art Robert Gibson. SCALE OF NOTATION . Integers . 7 3 4 2 1 86 Decimals . 8753 5 326 ∞ tenth parts . hundredth parts . thousandth parts . ten thousandth parts ...
Containing All the Instructions Requisite for the Skillful Practice of this Art Robert Gibson. SCALE OF NOTATION . Integers . 7 3 4 2 1 86 Decimals . 8753 5 326 ∞ tenth parts . hundredth parts . thousandth parts . ten thousandth parts ...
Page 63
... scale are formed , is the chord of 60 de- grees on the line of chords . THEO . XVI . PL . 1. fig . 34 . = If in two triangles ABC , abc , all the angles of one be each respec tively equal to all the angles of the other , that is , A. a ...
... scale are formed , is the chord of 60 de- grees on the line of chords . THEO . XVI . PL . 1. fig . 34 . = If in two triangles ABC , abc , all the angles of one be each respec tively equal to all the angles of the other , that is , A. a ...
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Common terms and phrases
ABCD acres altitude Answer arch base bearing centre chains and links circle circumferentor Co-sec Co-tang column compasses contained cube root decimal diagonal difference of latitude Dist 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 multiplied Natural Co-sines natural number natural sine Nonius number of degrees object observed off-sets opposite parallelogram perches perpendicular plane pole PROB proportional protractor Quadrant quotient radius rhombus right angles right line screw Secant sect semicircle side square root station subtract survey taken tance Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
Popular passages
Page 246 - ... that triangles on the same base and between the same parallels are equal...
Page 58 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Page 231 - RULE. From half the sum of the three sides subtract each side severally.
Page 45 - 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.
Page 14 - 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.
Page 5 - 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...
Page 91 - ... 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.
Page 35 - 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.
Page 30 - 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.
Page 211 - At 170 feet distance from the bottom of a tower, the angle of its elevation was found to be 52° 30' : required the altitude of the tower ? Ans.