Practical Surveying: A Text-book for Students Preparing for Examinations Or for Survey-work in the ColoniesC. Lockwood and Son, 1889 - 272 σελίδες |
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Αποτελέσματα 1 - 5 από τα 33.
Σελίδα vi
... Lower Plate - The Upper or Vernier Plate - Clamps Troughton's Clamp and Tangent Arrangement— Levelling Plates - Vertical Arc - Compass - Telescope - The Dia- phragm The Vernier - Transit Theodolite - Triangular Plate— Everest Theodolite ...
... Lower Plate - The Upper or Vernier Plate - Clamps Troughton's Clamp and Tangent Arrangement— Levelling Plates - Vertical Arc - Compass - Telescope - The Dia- phragm The Vernier - Transit Theodolite - Triangular Plate— Everest Theodolite ...
Σελίδα 30
... lower portion with a rack and pinion movement actuated by the screw a . A ring on the lower member is divided into degrees and subdivisions , and , with a vernier attached to the upper cylinder , it is possible - with the greatest care ...
... lower portion with a rack and pinion movement actuated by the screw a . A ring on the lower member is divided into degrees and subdivisions , and , with a vernier attached to the upper cylinder , it is possible - with the greatest care ...
Σελίδα 31
... lower portion being plain ) placed at an angle of 45 deg . with each other . Referring to Figs . 51 and 52 it will be seen that the glass E is placed at an angle of 120 deg . with the line of sight or diameter of the box , and the ...
... lower portion being plain ) placed at an angle of 45 deg . with each other . Referring to Figs . 51 and 52 it will be seen that the glass E is placed at an angle of 120 deg . with the line of sight or diameter of the box , and the ...
Σελίδα 33
... lower arm G , whilst upon one D G CIAGO F Fig . 56 . of the sides is engraved a scale and table of hypotenusal allow- ances , and the more complete clinometers are accompanied by a small compass F. In using this instrument for acclivity ...
... lower arm G , whilst upon one D G CIAGO F Fig . 56 . of the sides is engraved a scale and table of hypotenusal allow- ances , and the more complete clinometers are accompanied by a small compass F. In using this instrument for acclivity ...
Σελίδα 40
... lower slot in c has the wire , and that in B is similar to that in c to look through . It will also be observed that at the top of B and bottom of c are what appear in the figures to be dots , which are really small holes , while at the ...
... lower slot in c has the wire , and that in B is similar to that in c to look through . It will also be observed that at the top of B and bottom of c are what appear in the figures to be dots , which are really small holes , while at the ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
A B C accuracy accurately adjusted arrow axis back and fore back-sight beam compasses bench-mark boundaries centre chain chain-line check-lines chords clamped clinometer column commencement compass consequently Cosec cosine cross-wires curvature curve datum direction distance divided end of line equal feet fence field-book figures fixed fore sights ground hedge horizontal hypotenuse inches instrument intermediate intersection length level-book line A B line of collimation logarithm magnetic north mark means measured necessary observed offsets parallel plates pencil perpendicular plane plotted plumb-bob position post-and-rail fence quadrant radius reading reference right angles scale screw seen sextant side sine sketch slope square staff station straight line streets survey surveyor take the angle taken tangent tangential angle telescope theodolite tion traverse triangle trigonometry vernier vertical whilst Wimbledon Park wires zero
Δημοφιλή αποσπάσματα
Σελίδα 86 - If two triangles have two sides of the one equal to two sides of the...
Σελίδα 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...
Σελίδα 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.
Σελίδα 61 - When you have proved that the three angles of every triangle are equal to two right angles...
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 85 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.