The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtEvert Duyckinck, 1814 - 508 σελίδες |
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Αποτελέσματα 6 - 10 από τα 100.
Σελίδα 72
... distance from A , as a centre , describe a circle from the line AB ; take 45 degrees , the quantity of the given angle , from the same scale of chords , and lay it on that circle from a to b ; through A and b , draw the line AbC , and ...
... distance from A , as a centre , describe a circle from the line AB ; take 45 degrees , the quantity of the given angle , from the same scale of chords , and lay it on that circle from a to b ; through A and b , draw the line AbC , and ...
Σελίδα 80
... distance of the ex- tremities of these rules are the subtenses or chords , or the arches they describe . Sectors are made of different sizes , but their length is usually denominated from the length of the legs when the sector is shut ...
... distance of the ex- tremities of these rules are the subtenses or chords , or the arches they describe . Sectors are made of different sizes , but their length is usually denominated from the length of the legs when the sector is shut ...
Σελίδα 81
... distance the sector be opened , the angles will be always re- spectively equal . That is , the distance between 10 and 10 on the line of lines , will be equal to 60 and 60 on the line of chords , 90 and 90 on the line of sines , and 45 ...
... distance the sector be opened , the angles will be always re- spectively equal . That is , the distance between 10 and 10 on the line of lines , will be equal to 60 and 60 on the line of chords , 90 and 90 on the line of sines , and 45 ...
Σελίδα 83
... distance . But if the measure be taken from any point in one line , to its corresponding point on the line of the same denomination , on the other leg ... distance of the first term ; the parallel distance of the DRAWING INSTRUMENTS . 83.
... distance . But if the measure be taken from any point in one line , to its corresponding point on the line of the same denomination , on the other leg ... distance of the first term ; the parallel distance of the DRAWING INSTRUMENTS . 83.
Σελίδα 84
... distance of 4 , and make it the parallel distance of 8 ; then the parallel dis- tance of 6 , extended from the centre , shall reach to the fourth proportional 3 . In the same manner a third proportional is found to two numbers . Thus ...
... distance of 4 , and make it the parallel distance of 8 ; then the parallel dis- tance of 6 , extended from the centre , shall reach to the fourth proportional 3 . In the same manner a third proportional is found to two numbers . Thus ...
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acres altitude Answer arch base bearing blank line centre chains and links circle circle of latitude circumferentor Co-sec Co-tang column compasses contained decimal difference Dist divided divisions draw east Ecliptic edge EXAMPLE feet field-book figures fore four-pole chains geometrical series given angle given number half the sum Horizon glass hypothenuse inches instrument latitude length logarithm measure meridian distance minutes multiplied natural sine Nonius number of degrees object observed off-sets opposite parallelogram perches perpendicular plane pole pole star PROB proportion protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect semicircle side sights square root station stationary distance subtracted survey taken tance Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
Δημοφιλή αποσπάσματα
Σελίδα 52 - 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.
Σελίδα 39 - The Circumference of every circle is supposed to be divided into 360 equal parts, called Degrees ; and each degree into 60 Minutes, each minute into 60 Seconds, and so on.
Σελίδα 18 - DISTINGUISH the given number into periods of two figures each, by putting a point over the place of units, another over the place of hundreds, and so on, which points shew the number of figures the root will consist of. 2. " FIND the greatest square number in the first, or left hand period...
Σελίδα 120 - 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.
Σελίδα 31 - 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 87 - On the line of lines make the lateral distance 10, a transverse distance between 8 on one leg, and 6 on the other leg. On the line of sines make the lateral distance 90, a transverse distance from 45 to 45 ; or from 40 to 50 ; or from 30 to 60 ; or from the sine of any degree to their complement.
Σελίδα 7 - RULE. Divide as in whole numbers, and from the right hand of the quotient point off as many places for decimals as the decimal places in the dividend exceed those in the divisor.
Σελίδα 82 - ... longer than the intermediate adjacent ones, these are whole degrees ; the shorter ones, or those of the third order, are 30 minutes. From the centre, to 60 degrees, the line of sines is divided like the line of tangents ; from 60 to 70, it is divided only to every degree ; from 70 to 80, to every two degrees ; from 80 to 90, the division must be estimated by the eye.