The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 σελίδες |
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Αποτελέσματα 1 - 5 από τα 74.
Σελίδα 64
... PROB . I. PL . 2. fig . 7 . To make a triangle of three given right lines BO , LB , LO , of which any two must be greater than the third . Lay BL from B to L ; from B with the line BO , describe an arc , and from L with LO describe ano ...
... PROB . I. PL . 2. fig . 7 . To make a triangle of three given right lines BO , LB , LO , of which any two must be greater than the third . Lay BL from B to L ; from B with the line BO , describe an arc , and from L with LO describe ano ...
Σελίδα 65
... PROB . III . PL . 2. fig . 9 . To bisect or divide into two equal parts , any given right- lined angle , BAC . = In the lines AB and AC , from the point A set off equal distances AE , AD , then , with any dis- tance more than the half ...
... PROB . III . PL . 2. fig . 9 . To bisect or divide into two equal parts , any given right- lined angle , BAC . = In the lines AB and AC , from the point A set off equal distances AE , AD , then , with any dis- tance more than the half ...
Σελίδα 66
... PROB . V. PL . 2. fig . 11 . On a given point A , in a right line EF , to erect a perpen- dicular . From the point A lay off on each side , the equal distances , AC , AD ; and from Cand D , as centres , with any interval greater than AC ...
... PROB . V. PL . 2. fig . 11 . On a given point A , in a right line EF , to erect a perpen- dicular . From the point A lay off on each side , the equal distances , AC , AD ; and from Cand D , as centres , with any interval greater than AC ...
Σελίδα 67
... PROB . VII . PL . 2. fig . 13 . From a given point A , to let fall a perpendicular upon a given right line BC . From any point D , in the given line , take the distance to the given point A , and with it describe a circle AGE , make GE ...
... PROB . VII . PL . 2. fig . 13 . From a given point A , to let fall a perpendicular upon a given right line BC . From any point D , in the given line , take the distance to the given point A , and with it describe a circle AGE , make GE ...
Σελίδα 68
... prob . 2. The angle BAFAFE , and by theo . 11. BA and CD are parallel . PROB . IX . PL . 1. fig . 17 , Upon a given line AB to describe a square ABCD . Make BC perpendicular and equal to AB ; and from A and C , with the line AB , or BC ...
... prob . 2. The angle BAFAFE , and by theo . 11. BA and CD are parallel . PROB . IX . PL . 1. fig . 17 , Upon a given line AB to describe a square ABCD . Make BC perpendicular and equal to AB ; and from A and C , with the line AB , or BC ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
acres altitude Answer arch azimuth base bearing blank line centre chains and links chord circle circumferentor Co-sec Co-tang column compasses contained decimal difference distance line divided divisions draw east Ecliptic edge feet field-book figures fore four-pole chains geom given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied natural co-sine natural sine needle Nonius number of degrees object observed off-sets opposite parallel parallelogram pegs perches perpendicular plane pole pole star Portmarnock PROB protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect Sextant side sights square station stationary distance subtract Sun's survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
Δημοφιλή αποσπάσματα
Σελίδα 38 - 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 25 - 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.
Σελίδα 197 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 106 - 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 27 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc. Thus BA is the versed sine of the arc AG.