Practical Surveying: A Text-book for Students Preparing for Examinations Or for Survey-work in the ColoniesC. Lockwood and Son, 1889 - 272 Seiten |
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Seite ix
... means of Ordinates 210-228 CHAPTER XII . OFFICE WORK . Necessity for System - Roughly plot the Survey Lines - Let the Paper be well seasoned - Draw Scale on Paper before commencing - Box- wood Scales best - Plot Survey North and South ...
... means of Ordinates 210-228 CHAPTER XII . OFFICE WORK . Necessity for System - Roughly plot the Survey Lines - Let the Paper be well seasoned - Draw Scale on Paper before commencing - Box- wood Scales best - Plot Survey North and South ...
Seite 10
... means of permanent bronze marks , let into the granite plinth of the terrace wall in front of the National Gallery . There is also a stan- dard in the Guildhall , belonging to the Corporation of London ; and in nearly every city and ...
... means of permanent bronze marks , let into the granite plinth of the terrace wall in front of the National Gallery . There is also a stan- dard in the Guildhall , belonging to the Corporation of London ; and in nearly every city and ...
Seite 11
... means of laths or whites , which will be useful in guiding the leader to keep in the direction it is necessary to go . The sur- veyor must impress this upon him , as I have sometimes found that the leader will elect to walk in a certain ...
... means of laths or whites , which will be useful in guiding the leader to keep in the direction it is necessary to go . The sur- veyor must impress this upon him , as I have sometimes found that the leader will elect to walk in a certain ...
Seite 12
... means the proper length may be adjusted . After placing an arrow in the ground at the end of the first chain , the leader proceeds in direction of the goal , until he has reached the limit of the chain . The follower , having walked to ...
... means the proper length may be adjusted . After placing an arrow in the ground at the end of the first chain , the leader proceeds in direction of the goal , until he has reached the limit of the chain . The follower , having walked to ...
Seite 13
... means of what is called a " post - and - rail fence " ( see Figs . 14 and 15 ) , which represents the extremity ( on either side ) of the property acquired by the company ; and one of the last things done before the completion of the ...
... means of what is called a " post - and - rail fence " ( see Figs . 14 and 15 ) , which represents the extremity ( on either side ) of the property acquired by the company ; and one of the last things done before the completion of the ...
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accuracy accurately adjusted arrow axis back and fore back-sight beam compasses bench-mark boundaries centre chain chain-line chords clamped clinometer colour commencement compass consequently Cosec cosine cross-staff cross-wires curve direction distance ditch divided DUMPY LEVEL end of line equal feet fence field-book figures fixed fore sight ground hedge hypotenuse illustration inch instrument intermediate intersection length line A B line of collimation logarithm mark means measured necessary observed offsets parallel plate pencil perpendicular plane plot plumb-bob position post-and-rail fence quadrant radius ratio reading reference represent right angles scale screw secant seen sextant shown side sine sketch square staff station straight line survey surveyor take the angle tangent tangential angle telescope theodolite tion traverse triangle trigonometry upper vernier whilst Wimbledon Park wires zero دو دو
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Seite 86 - If two triangles have two sides of the one equal to two sides of the...
Seite 89 - IF a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another; and the exterior angle equal to the interior and opposite upon...
Seite 85 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Seite 61 - When you have proved that the three angles of every triangle are equal to two right angles...
Seite 85 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16.
Seite 92 - In any right-angled triangle, the square which is described on the side subtending the right angle is equal to the sum of the squares described on the sides which contain the right angle.
Seite 116 - In any plane triangle, as the sum of the sides about the vertical angle is to their difference, so is the tangent of half the sum of the angles at the base to the tangent of half their difference.
Seite 85 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.
Seite 127 - As the sum of the two given sides Is to their difference, So is the tangent of half the sum of their opposite angles To the tangent of half the difference of the same angles.
Seite 85 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.