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 117
... station No. 1 ; and in the same line , under the title of distances in the third column , let the measure of the line AB in chains and links be inserted . Being now arrived at B , let one chain be laid in a direct line from B towards A ...
... station No. 1 ; and in the same line , under the title of distances in the third column , let the measure of the line AB in chains and links be inserted . Being now arrived at B , let one chain be laid in a direct line from B towards A ...
Página 118
... station . Explanation of the Remarks . Mr. J. D's part of Grange bounds or is adjacent to the sur- veyed land from the first to the third station ; Mr. L. P's part of Portmarnock bounds it from the third to the fourth station ; the ...
... station . Explanation of the Remarks . Mr. J. D's part of Grange bounds or is adjacent to the sur- veyed land from the first to the third station ; Mr. L. P's part of Portmarnock bounds it from the third to the fourth station ; the ...
Página 119
... station . If any line of the field be inaccessible , as suppose CD to be , then by way of proof that the distance CD is true , let the mea- sure of the angle CHD be taken by the line oo , with the chain : if this angle corresponds with ...
... station . If any line of the field be inaccessible , as suppose CD to be , then by way of proof that the distance CD is true , let the mea- sure of the angle CHD be taken by the line oo , with the chain : if this angle corresponds with ...
Página 121
... station ; and let a person stand at the next angle B , or cause.a staff with a white sheet to be set there perpendicularly for an object to take your view to : then having placed your instru- ment horizontally ( which is easily done by ...
... station ; and let a person stand at the next angle B , or cause.a staff with a white sheet to be set there perpendicularly for an object to take your view to : then having placed your instru- ment horizontally ( which is easily done by ...
Página 122
... station No. 1 . It is customary , and even necessary , to cause a sod to be dug up at each station or place where you fix the instrument , to the end that if any error should arise in the field - book it may be the more readily adjusted ...
... station No. 1 . It is customary , and even necessary , to cause a sod to be dug up at each station or place where you fix the instrument , to the end that if any error should arise in the field - book it may be the more readily adjusted ...
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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.