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 19
... back , to prevent which , place your toe against the end , and so on until you have reached the point . A little ... sight is obtained than by being so close to the rod . It is advisable AP Ja Ib le Fig . 28 . If B to range out a ...
... back , to prevent which , place your toe against the end , and so on until you have reached the point . A little ... sight is obtained than by being so close to the rod . It is advisable AP Ja Ib le Fig . 28 . If B to range out a ...
Seite 37
... back , в the sight- vane for the compass , and D C folding over it , in doing Fig . 66 . which it presses a knob which throws the card off its centre , and cis the sight - vane for the clinometer , which also folds back . Fig . 67 shows ...
... back , в the sight- vane for the compass , and D C folding over it , in doing Fig . 66 . which it presses a knob which throws the card off its centre , and cis the sight - vane for the clinometer , which also folds back . Fig . 67 shows ...
Seite 39
... sight - vane c , and at the other is a magnifying prism B , enclosed in a metal case , having a slot for observation , so arranged that whilst the eye ... back on to the ring of the box , and is held in position by the movable strap b ...
... sight - vane c , and at the other is a magnifying prism B , enclosed in a metal case , having a slot for observation , so arranged that whilst the eye ... back on to the ring of the box , and is held in position by the movable strap b ...
Seite 40
... sight ( B ) contains a vertical wire , whilst the corresponding slot in c is ... back or front . When out of use these sights or arms , by hinges , fold over ... sight . Thus , to take an observation , place the instrument ...
... sight ( B ) contains a vertical wire , whilst the corresponding slot in c is ... back or front . When out of use these sights or arms , by hinges , fold over ... sight . Thus , to take an observation , place the instrument ...
Seite 168
... ---- MARKET -------- OF LEATHERHEAD . N.B. This sketch illustrates the method of taking the projections of the various buildings in the streets . GH ST 1 LINE OF BACK SIGHT A 6-30 STAFF INTERMEDIATE a 168 TOWN SURVEYING .
... ---- MARKET -------- OF LEATHERHEAD . N.B. This sketch illustrates the method of taking the projections of the various buildings in the streets . GH ST 1 LINE OF BACK SIGHT A 6-30 STAFF INTERMEDIATE a 168 TOWN SURVEYING .
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Häufige Begriffe und Wortgruppen
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
Beliebte Passagen
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.