The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 páginas |
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Página 1
... measuring land , and cé delineating its boundaries on a map . The Surveyor , in the practice of this art , directs his attention , at first , to the tracing and measur- ing of lines ; secondly , to the position of these lines in respect ...
... measuring land , and cé delineating its boundaries on a map . The Surveyor , in the practice of this art , directs his attention , at first , to the tracing and measur- ing of lines ; secondly , to the position of these lines in respect ...
Página 39
... measure of the arc . Thus the right Thus the right line HG , is the mea- sure of the arc HBG . fig . 8 . 18. The segment of a circle is any part there- of , which is cut off by a chord : thus the space which is comprehended between the ...
... measure of the arc . Thus the right Thus the right line HG , is the mea- sure of the arc HBG . fig . 8 . 18. The segment of a circle is any part there- of , which is cut off by a chord : thus the space which is comprehended between the ...
Página 41
... the sine of the arc HB , or of its supplement ADH . fig . 8 . 28. The measure of a right - lined angle , is the arc of a circle swept from the angular point , and G 3. When the chord is greatest it becomes a di- GEOMETRY . 41.
... the sine of the arc HB , or of its supplement ADH . fig . 8 . 28. The measure of a right - lined angle , is the arc of a circle swept from the angular point , and G 3. When the chord is greatest it becomes a di- GEOMETRY . 41.
Página 43
... o = ing them according to demais self - same line ; thus H1 fis ar : ne of HB , or of its supplemen : 8 28. The measure of ancie arc of a circle swept for angular p T ABCD is a parallelogram . Fig . 3. 17 ,. GEOMETRY . 41.
... o = ing them according to demais self - same line ; thus H1 fis ar : ne of HB , or of its supplemen : 8 28. The measure of ancie arc of a circle swept for angular p T ABCD is a parallelogram . Fig . 3. 17 ,. GEOMETRY . 41.
Página 51
... measured by half the arc it subtends or stands on . Fig . 26 . Cor . 2. Hence all angles at the circumference of a circle which stands on the same chord as AB , are equal to each other , for they are all measured by half the arc they ...
... measured by half the arc it subtends or stands on . Fig . 26 . Cor . 2. Hence all angles at the circumference of a circle which stands on the same chord as AB , are equal to each other , for they are all measured by half the arc they ...
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Términos y frases comunes
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
Pasajes populares
Página 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.
Página 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.
Página 197 - RULE. From half the sum of the three sides subtract each side severally.
Página 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.
Página 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.