Practical Surveying: A Text-book for Students Preparing for Examinations Or for Survey-work in the ColoniesC. Lockwood and Son, 1889 - 272 Seiten |
Im Buch
Ergebnisse 1-5 von 23
Seite vi
... Axis - Centering Plates - Parallel Plates - Parallel Plate Screws - Ball and Socket Arrangement - The Limb or Lower Plate - The Upper or Vernier Plate - Clamps - Troughton's Clamp and Tangent Arrangement- Levelling Plates - Vertical Arc ...
... Axis - Centering Plates - Parallel Plates - Parallel Plate Screws - Ball and Socket Arrangement - The Limb or Lower Plate - The Upper or Vernier Plate - Clamps - Troughton's Clamp and Tangent Arrangement- Levelling Plates - Vertical Arc ...
Seite 34
... Axis of Axis of 오 이 Fig . 58 . Bubble being complete when the bubble is coincident with the horizontal line of the half- Telescope silvered mirror at its inter- section with the distant point . Referring to Fig . 58 , it will be ...
... Axis of Axis of 오 이 Fig . 58 . Bubble being complete when the bubble is coincident with the horizontal line of the half- Telescope silvered mirror at its inter- section with the distant point . Referring to Fig . 58 , it will be ...
Seite 41
... Axis . - This is done by means of a plumb - bob suspended from a small hook held in the centre of the stock - head . It requires the greatest care and patience to do this , as much depends upon the manner in which the tripod has been ...
... Axis . - This is done by means of a plumb - bob suspended from a small hook held in the centre of the stock - head . It requires the greatest care and patience to do this , as much depends upon the manner in which the tripod has been ...
Seite 42
... Fig . 75 . vertical axis of the instrument over a station , by means of centering- stands , whereby the plumb - bob may be adjusted to a nicety . One CENTERING - PLATES OF THE THEODOLITE . 43 of these 42 SURVEYING INSTRUMENTS .
... Fig . 75 . vertical axis of the instrument over a station , by means of centering- stands , whereby the plumb - bob may be adjusted to a nicety . One CENTERING - PLATES OF THE THEODOLITE . 43 of these 42 SURVEYING INSTRUMENTS .
Seite 44
... axis over a station , and when accomplished , the centering - plates may be firmly secured by means of the clamp - screw F , which is connected with the wedge E , and by drawing it inwards jambs the two plates so that they cannot move ...
... axis over a station , and when accomplished , the centering - plates may be firmly secured by means of the clamp - screw F , which is connected with the wedge E , and by drawing it inwards jambs the two plates so that they cannot move ...
Andere Ausgaben - Alle anzeigen
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.