The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art. With a New Set of Accurate Mathematical TablesHarper, 1832 - 348 páginas |
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Página 187
... departures . The learner must not expect that in real practice the columns of lat . and those of dep . will exactly balance when they are at first added up , for little inaccuracies will arise , both from the observations taken in the ...
... departures . The learner must not expect that in real practice the columns of lat . and those of dep . will exactly balance when they are at first added up , for little inaccuracies will arise , both from the observations taken in the ...
Página 189
... departure , it is easy to observe , that in the columns of eastings opposite station 9 all the eastings may be added , and the westings subtracted , without altering the denomination of either . Therefore , by placing 46.0 , the east ...
... departure , it is easy to observe , that in the columns of eastings opposite station 9 all the eastings may be added , and the westings subtracted , without altering the denomination of either . Therefore , by placing 46.0 , the east ...
Página 191
... departure answering to each course and distance by the Traverse Table or right- angled plane trigonometry , according to the directions already given , and place them under the succeeding columns North or South , East or West ...
... departure answering to each course and distance by the Traverse Table or right- angled plane trigonometry , according to the directions already given , and place them under the succeeding columns North or South , East or West ...
Página 192
... departure to the correction of the corresponding departure , each correction be- ing so applied as to diminish the whole error in departure : pro- in his elegant solution of the said question , analytically demonstrated . As the ...
... departure to the correction of the corresponding departure , each correction be- ing so applied as to diminish the whole error in departure : pro- in his elegant solution of the said question , analytically demonstrated . As the ...
Página 193
... departure , that is , add when of the same name and AB . Now the former change would not tend effectually to decrease the distance AE , but the latter would be almost wholly exerted in producing that effect . Again , the length of the ...
... departure , that is , add when of the same name and AB . Now the former change would not tend effectually to decrease the distance AE , but the latter would be almost wholly exerted in producing that effect . Again , the length of the ...
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Términos y frases comunes
ABCD acres altitude arch azimuth base bearing blank line centre chains and links circle circumferentor co-sine column compasses contained cube root decimal diagonal diameter difference of latitude 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 logarithm manner measure meridian distance method multiplied needle nonius number of degrees object observed offsets opposite parallelogram perches perpendicular plane prob PROBLEM proportion protractor quadrant quotient radius rhombus right angles right line scale of equal SCHOLIUM screw secant sect sector semicircle side square root station stationary distance subtract suppose survey taken tangent theo theodolite THEOREM third trapezium triangle ABC trigonometry two-pole chains vane vulgar fraction whence
Pasajes populares
Página 173 - In like manner, when it is said, that " triangles on the same base, and between the same parallels, are equal...
Página 49 - 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.
Página 163 - RULE. From half the sum of the three sides subtract each side severally.
Página 41 - 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.
Página 97 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Página 41 - The radius of a circle is a right line drawn from the centre to the circumference.
Página 52 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Página 24 - The square of the sum of two numbers is equal to the square of the first number plus twice the product of the first and second number plus the square of the second number.
Página 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.