A Manual of Surveying for India, Detailing the Mode of Operations on the Revenue Surveys in Bengal and the North-western ProvincesW. Thacker, 1851 - 718 sider |
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Resultat 1-5 av 73
Side 109
... lower wheel graduations ; the lower plate being graduated to 60 parts or 10 divisions to a mile . The axle of the wheel runs in two hinges secured to the shafts , and so constructed that the wheel is easily detached from the body of the ...
... lower wheel graduations ; the lower plate being graduated to 60 parts or 10 divisions to a mile . The axle of the wheel runs in two hinges secured to the shafts , and so constructed that the wheel is easily detached from the body of the ...
Side 120
... lower end of the internal axis . The diameter of the lower plate is greater than that of the upper one , and its edge is chamfered off and covered with silver , to receive the graduations : on opposite parts of the edge of the upper ...
... lower end of the internal axis . The diameter of the lower plate is greater than that of the upper one , and its edge is chamfered off and covered with silver , to receive the graduations : on opposite parts of the edge of the upper ...
Side 121
... they make a very firm stand , be the ground ever so uneven . The lower horizontal limb can be fixed in any position , by tightening the clamping screw , H , which causes the collar , c , R to embrace the axis , C , and prevent its 121.
... they make a very firm stand , be the ground ever so uneven . The lower horizontal limb can be fixed in any position , by tightening the clamping screw , H , which causes the collar , c , R to embrace the axis , C , and prevent its 121.
Side 122
... lower , in any position , by a clamp which is also furnished with a tangent - screw . The motion of this limb , and of the vertical arc , hereafter to be described , is sometimes effected by a rack and pinion ; but this is greatly ...
... lower , in any position , by a clamp which is also furnished with a tangent - screw . The motion of this limb , and of the vertical arc , hereafter to be described , is sometimes effected by a rack and pinion ; but this is greatly ...
Side 125
... lower horizontal limb by the staff - head clamp , H , leaving the upper limb at liberty , but move it till the telescope is over two of the parallel plate- screws ; then bring the bubble of the level under the telescope , to the middle ...
... lower horizontal limb by the staff - head clamp , H , leaving the upper limb at liberty , but move it till the telescope is over two of the parallel plate- screws ; then bring the bubble of the level under the telescope , to the middle ...
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Vanlige uttrykk og setninger
accuracy adjustment altitude angular axis azimuth base Beam Compass bisect boundary centre chord circle collimation compasses computation construction correct deducted degrees describe difference distance divided Draw the line drawn edge error feet Field-book figure fixed given line ground half height horizontal inches instrument intersection latitude length limb Logarithm longitude main circuit mark measure meridian method natural number object observed angle obtain offsets opposite parallax parallel parallelogram perpendicular plane plate polygon position PROB produced protractor radius Ray Trace reading rhombus right angles right line scale of equal screw segment sextant side Sine square station line straight line subtract Survey Surveyor taken talc tangent telescope Theo Theodolite triangle ABC Trigono Trigonometrical Trigonometrical Survey tube vernier vernier scale vertical village wires zero وو
Populære avsnitt
Side 7 - Things which are equal to the same thing are equal to one another. 2. If equals be added to equals the wholes are equal. 3. If equals be taken from equals the remainders are equal. 4. If equals be added to unequals the wholes are unequal. 5. If equals be taken from unequals the remainders are unequal. 6. Things which are double of the same are equal to one another.
Side 2 - But when a straight line standing upon another straight line makes the adjacent angles equal to one another, each of the angles is a right angle : (Ю.
Side 14 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Side 12 - F, which is the common vertex of the triangles: that is », together with four right angles. Therefore all the angles of the figure, together with four right angles are equal to twice as many right angles as the figure has sides.
Side 240 - Upon the same base, and on the same side of it, there cannot be two triangles that have their sides which are terminated in one extremity of the base equal to one another, and likewise those which are terminated in the other extremity.
Side 2 - When several angles are at one point B, any one of them is expressed by three letters, of which the letter that is at the vertex of the angle, that is, at the point in which the straight lines that contain the angle meet one another, is put between the other two letters, and one of these two...
Side 4 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Side 273 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Side 149 - ... to make the objects appear on the other wire ; if the contact still remains perfect, the axis of the telescope is in proper adjustment ; if not, it must be altered by moving the two screws which fasten, to the up-and-down piece, the collar into which the telescope screws. This adjustment is not very liable to be deranged.
Side 5 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees...