The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art |
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Page 92
... latitude . The graduated line of chords is necessary , in order to shew the latitudes ; the line of longitude shews the quantity of a degree on each parallel in sixtieth parts of an equatorial degree , that is , miles . The lines of ...
... latitude . The graduated line of chords is necessary , in order to shew the latitudes ; the line of longitude shews the quantity of a degree on each parallel in sixtieth parts of an equatorial degree , that is , miles . The lines of ...
Page 97
... latitude of that division . Or the extent from any division to another , on the line of meridional parts , applied to the line of equal parts , will give the meridional dif- ference of latitude between the two places denoted by the ...
... latitude of that division . Or the extent from any division to another , on the line of meridional parts , applied to the line of equal parts , will give the meridional dif- ference of latitude between the two places denoted by the ...
Page 160
... triangles are twice as many right ones as there are sides : but all the angles about the point H , are 160 THE THEODOLITE . The Theodolite To find the Latitude by the Meridian titude of the Sun 316 The Theodolite Description of Instru-
... triangles are twice as many right ones as there are sides : but all the angles about the point H , are 160 THE THEODOLITE . The Theodolite To find the Latitude by the Meridian titude of the Sun 316 The Theodolite Description of Instru-
Page 217
... founded most of the cal- culations of differences by latitude and departure , and those by offsets , following in this treatise . Ff EXAMPLES . 1. Required the area of a trapezoid , To find the Content of Ground . 217.
... founded most of the cal- culations of differences by latitude and departure , and those by offsets , following in this treatise . Ff EXAMPLES . 1. Required the area of a trapezoid , To find the Content of Ground . 217.
Page 232
... latitude , or the northing or southing of any stationary line , is the distance that one end of the line is north or south from the other end ; or it is the distance which is intercepted on the meridian , between the beginning of the ...
... latitude , or the northing or southing of any stationary line , is the distance that one end of the line is north or south from the other end ; or it is the distance which is intercepted on the meridian , between the beginning of the ...
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Common terms and phrases
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
Popular passages
Page 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.
Page 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.
Page 197 - RULE. From half the sum of the three sides subtract each side severally.
Page 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.
Page 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.