## A Manual of Surveying for India, Detailing the Mode of Operations on the Revenue Surveys in Bengal and the North-western Provinces |

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### Common terms and phrases

accuracy added adjustment altitude applied axis azimuth base bearings boundary called carried centre chord circle circuit compasses computation construction contained correct deducted describe determined difference direction distance divided divisions draw drawn edge equal error EXAMPLE extent feet field figure fixed four give given greater ground half height horizontal inches instrument intersection latitude length less limb Logarithm lower manner mark means measured meridian method minutes moved necessary object observed obtain offsets operation opposite parallel pass perpendicular plane plate position PROB produced radius represent right angles rule scale screw side Sine square staff station straight Survey Surveyor taken tangent telescope Theo Theodolite third triangle true turn upper vernier vertical village whole wires zero

### Popular passages

Page 5 - 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.

Page xxiv - 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.

Page 12 - 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.

Page 10 - 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.

Page 238 - 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.

Page xxiv - 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...

Page 2 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.

Page 271 - 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.

Page 147 - ... 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.

Page 3 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees...