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 TablesA. S. Barnes, 1839 - 412 páginas |
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Página 122
... corrected , by trying over the former bearings and stationary distances . Having done with your first station , set the instrument over the hole or spot where your object stood , as at B , for your second station , and send him forward ...
... corrected , by trying over the former bearings and stationary distances . Having done with your first station , set the instrument over the hole or spot where your object stood , as at B , for your second station , and send him forward ...
Página 187
... corrected as follows : Add all the distances into one sum , and say , as that sum is to each particular distance , so is the difference between the sums of the columns of northing and southing to the correction of northing or southing ...
... corrected as follows : Add all the distances into one sum , and say , as that sum is to each particular distance , so is the difference between the sums of the columns of northing and southing to the correction of northing or southing ...
Página 188
... CORRECTING A SURVEY . From the Tables , Corrected . ¡ Dist . No. Courses , Per . N. S. E. W. N. S. E. W. 1 S 40 ° W 70 ... correction belonging 218.0 257.0 Diff . = .4 .2 = Diff . In this manner the several corrections of the southings ...
... CORRECTING A SURVEY . From the Tables , Corrected . ¡ Dist . No. Courses , Per . N. S. E. W. N. S. E. W. 1 S 40 ° W 70 ... correction belonging 218.0 257.0 Diff . = .4 .2 = Diff . In this manner the several corrections of the southings ...
Página 189
... corrections of the southings 53.6 29.1 135.7 .04 ) are found to be .09 respectively . .07 But as only two of these corrections amount to half a tenth , we must use .1 for each of the corrections .09 and .07 , and neglect the correction ...
... corrections of the southings 53.6 29.1 135.7 .04 ) are found to be .09 respectively . .07 But as only two of these corrections amount to half a tenth , we must use .1 for each of the corrections .09 and .07 , and neglect the correction ...
Página 191
... correcting a survey in No. 4 of the Analyst . Also , the editor , Dr. Adrain , has given precisely the same practical rule , particular distance , so is the whole error in departure 16 * COMPUTATION OF AREAS . 191 Of computing the.
... correcting a survey in No. 4 of the Analyst . Also , the editor , Dr. Adrain , has given precisely the same practical rule , particular distance , so is the whole error in departure 16 * COMPUTATION OF AREAS . 191 Of computing the.
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Términos y frases comunes
ABCD acres altitude arch base bearing blank line centre chains and links circle circumferentor column compasses contained Cosine Sine 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 multiplied needle nonius number of degrees object observed opposite parallelogram perches perpendicular plane prob PROBLEM proportion protractor quadrant quotient radius rhombus right angles right line scale of equal screw secant sect sector semicircle side Sine Cotang square root station stationary distance subtract suppose survey taken Tang tangent theo theodolite THEOREM trapezium triangle ABC trigonometry two-pole chains vane vulgar fraction whence
Pasajes populares
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 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 41 - The radius of a circle is a right line drawn from the centre to the circumference.
Página 45 - A lemma is something which is premised, or demonstrated, in order to render what follows more easy. A corollary is a consequent truth derived immediately from some preceding truth or demonstration.
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.
Página 21 - 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.