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 157
... east into 90 , from the north to the west into 90 , from the south to the east into 90 , and from the south to the west into 90 degrees ; so the degrees are numbered from the north to the east or west , and from the south to the east or ...
... east into 90 , from the north to the west into 90 , from the south to the east into 90 , and from the south to the west into 90 degrees ; so the degrees are numbered from the north to the east or west , and from the south to the east or ...
Σελίδα 158
... east , or west , you are then to write down N , S , E , or W , without annexing any degree . This is the manner of taking field notes , where- by the content of ground may be universally deter- mined by calculation ; and they are said ...
... east , or west , you are then to write down N , S , E , or W , without annexing any degree . This is the manner of taking field notes , where- by the content of ground may be universally deter- mined by calculation ; and they are said ...
Σελίδα 161
... east and west , or the situation of the land , is obtained . To take the bearing of each respective line from the meri- dian ; or to perform the office of the circumferentor , or quar- tered compass by the theodolite . Set your ...
... east and west , or the situation of the land , is obtained . To take the bearing of each respective line from the meri- dian ; or to perform the office of the circumferentor , or quar- tered compass by the theodolite . Set your ...
Σελίδα 172
... east , and W. at the bottom of your paper for west . i . Then let the following field - book be that which is to be protracted , the bearings being taken from the meridian , whether by a circumferentor , theodo- lite , or semicircle ...
... east , and W. at the bottom of your paper for west . i . Then let the following field - book be that which is to be protracted , the bearings being taken from the meridian , whether by a circumferentor , theodo- lite , or semicircle ...
Σελίδα 173
... east . Or if the right hand be made the north , and the left the south , the west will be then up , and the east down . In this case , if the degree be less than 180 , turù the arc of your protractor upwards , or towards the west ; and ...
... east . Or if the right hand be made the north , and the left the south , the west will be then up , and the east down . In this case , if the degree be less than 180 , turù the arc of your protractor upwards , or towards the west ; and ...
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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.