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 iv
... whilst to my former pupils , Messrs . H. S. Fearon and James Holden , I am indebted for the surveys of Wim- bledon Park and Cardiff . I wish also to acknowledge the assistance I have received from Mr. John F. Curwen , in the revision of ...
... whilst to my former pupils , Messrs . H. S. Fearon and James Holden , I am indebted for the surveys of Wim- bledon Park and Cardiff . I wish also to acknowledge the assistance I have received from Mr. John F. Curwen , in the revision of ...
Seite viii
... whilst Traversing - Plenty of Assistance required in Traversing - Northings and Southings in Traversing- As to closing a Traverse - Necessity for Care in checking - Rela- tive Positions of Bearings - Magnetic Variation or Declination ...
... whilst Traversing - Plenty of Assistance required in Traversing - Northings and Southings in Traversing- As to closing a Traverse - Necessity for Care in checking - Rela- tive Positions of Bearings - Magnetic Variation or Declination ...
Seite 3
... whilst at each end is a con veniently constructed brass handle . 3 Divisions of Gunter's Chain . - The first 10 links is distinguished by a tablet like this 40 10 20 ; the 20 thus , A ; the 30 thus , 30 the 40 thus ; and 50 links or the ...
... whilst at each end is a con veniently constructed brass handle . 3 Divisions of Gunter's Chain . - The first 10 links is distinguished by a tablet like this 40 10 20 ; the 20 thus , A ; the 30 thus , 30 the 40 thus ; and 50 links or the ...
Seite 8
... whilst in some cases special posts , built up and well strutted into the ground ( see sketch , Fig . 5 ) may be neces- sary . If pegs are used they should be 5 in . to 8 in . long and 14 in . square , driven with about 11⁄2 in ...
... whilst in some cases special posts , built up and well strutted into the ground ( see sketch , Fig . 5 ) may be neces- sary . If pegs are used they should be 5 in . to 8 in . long and 14 in . square , driven with about 11⁄2 in ...
Seite 10
... whilst the rest of the folded chain is held with the right , and by this means thrown smartly away , retaining hold of the two handles . Chain - men . Now , in all chaining operations , there is one person to drag the chain , called the ...
... whilst the rest of the folded chain is held with the right , and by this means thrown smartly away , retaining hold of the two handles . Chain - men . Now , in all chaining operations , there is one person to drag the chain , called 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.