The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 Seiten |
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Seite 134
... ground , are measured either by Gunter's chain of four poles or perches , which consists of 100 links ; ( and this is the most natural division ) or by one of 50 links , which contains two poles or perches : but because the length of a ...
... ground , are measured either by Gunter's chain of four poles or perches , which consists of 100 links ; ( and this is the most natural division ) or by one of 50 links , which contains two poles or perches : but because the length of a ...
Seite 135
... ground ; and leaving it . there , he draws on the chain till the hinder man checks him when he arrives at that peg : the chain being again stretched , the fore man sticks down up the former ; another peg , and the hind man takes and ...
... ground ; and leaving it . there , he draws on the chain till the hinder man checks him when he arrives at that peg : the chain being again stretched , the fore man sticks down up the former ; another peg , and the hind man takes and ...
Seite 136
... ground ; and leaving it there , he draws on the chain till the hinder man checks him when he arrives at that peg : the chain being again stretched , the fore man sticks down another peg , and the hind man takes up the former ; and thus ...
... ground ; and leaving it there , he draws on the chain till the hinder man checks him when he arrives at that peg : the chain being again stretched , the fore man sticks down another peg , and the hind man takes up the former ; and thus ...
Seite 140
... ground for houses is measured by feet , we , will shew how to re- duce one to the other , in the following problems . PROB . I. To reduce two - pole chains and links to four - pole ones . If the number of chains be even , the half of ...
... ground for houses is measured by feet , we , will shew how to re- duce one to the other , in the following problems . PROB . I. To reduce two - pole chains and links to four - pole ones . If the number of chains be even , the half of ...
Seite 145
... ground , by going round it , and the me- thod of taking the angles of the field , by the chain only . PL . 6. fig . 6 . Let ABCDEFG be a piece of ground to be sur- veyed : beginning at the point 4 , let one chain be laid in a direct ...
... ground , by going round it , and the me- thod of taking the angles of the field , by the chain only . PL . 6. fig . 6 . Let ABCDEFG be a piece of ground to be sur- veyed : beginning at the point 4 , let one chain be laid in a direct ...
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Häufige Begriffe und Wortgruppen
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
Beliebte Passagen
Seite 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.
Seite 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.
Seite 197 - RULE. From half the sum of the three sides subtract each side severally.
Seite 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.
Seite 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.