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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Σελίδα 40
... quadrant or the fourth part of the peri- phery : therefore the radius DC is always the sine of a quadrant , or of the fourth part of the circle BD . Sines are said to be of as many degrees as the arc contains parts of 360 : so the ...
... quadrant or the fourth part of the peri- phery : therefore the radius DC is always the sine of a quadrant , or of the fourth part of the circle BD . Sines are said to be of as many degrees as the arc contains parts of 360 : so the ...
Σελίδα 41
... quadrant is called the complement thereot : Thus DH is the com- plement of the arc HB . fig . 8 . 25. And what an arc wants of a semicircle is called the supplement thereof : thus AH is the supplement of the arc HB . fig . 8 . 26. The ...
... quadrant is called the complement thereot : Thus DH is the com- plement of the arc HB . fig . 8 . 25. And what an arc wants of a semicircle is called the supplement thereof : thus AH is the supplement of the arc HB . fig . 8 . 26. The ...
Σελίδα 42
... quadrant or the fourth part of the peri- phery : therefore the radius DC is always the sine of a quadrant , or of the fourth part of the Sines are said to be of as many degrees as the arc contains parts of 360 : so the radius being the ...
... quadrant or the fourth part of the peri- phery : therefore the radius DC is always the sine of a quadrant , or of the fourth part of the Sines are said to be of as many degrees as the arc contains parts of 360 : so the radius being the ...
Σελίδα 62
... quadrant of a circle described by the ra- dius CB ; HB an arc of it , and DH its complement ; HL or FC the sine , FH or CL its co - sinę , BK its tangent , DI its co- tangent ; CK its secant , and CI its co - secant . Fig . 8 . 1. The ...
... quadrant of a circle described by the ra- dius CB ; HB an arc of it , and DH its complement ; HL or FC the sine , FH or CL its co - sinę , BK its tangent , DI its co- tangent ; CK its secant , and CI its co - secant . Fig . 8 . 1. The ...
Σελίδα 74
... quadrant BD , and continu- ed to BE , we shall there have the tangents of 10 , 20 , 30 , 40 , & c . and the secants C 10 , C 20 , C30 , & c . are transferred to the line CF , by describing the arcs 10 , 10 : 20 , 20 : 30 , 30 , & c . If ...
... quadrant BD , and continu- ed to BE , we shall there have the tangents of 10 , 20 , 30 , 40 , & c . and the secants C 10 , C 20 , C30 , & c . are transferred to the line CF , by describing the arcs 10 , 10 : 20 , 20 : 30 , 30 , & c . If ...
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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.