Manual of Drawing and Surveying: Designed Especially for the Use of Students of the Imperial Forest College, Dehra Dun, United Provinces of Agra and Oudh |
From inside the book
Results 1-5 of 28
Page 5
... inch from one edge and parallel with it . Hold the ruler down firmly and turn the half inch edge up over the ruler ... longer of the two remaining sides and finally the shorter side . The mounted paper should be allowed to dry gradually ...
... inch from one edge and parallel with it . Hold the ruler down firmly and turn the half inch edge up over the ruler ... longer of the two remaining sides and finally the shorter side . The mounted paper should be allowed to dry gradually ...
Page 39
... inches long . From a point about 1 inch above the centre of A B drop a perpendicular on to it . Bisect the angle 2. Draw a line A B 3 inches long . Bisect it at C. At C erect a perpendicular to ... inches long . PRACTICAL PLANE GEOMETRY.- 39.
... inches long . From a point about 1 inch above the centre of A B drop a perpendicular on to it . Bisect the angle 2. Draw a line A B 3 inches long . Bisect it at C. At C erect a perpendicular to ... inches long . PRACTICAL PLANE GEOMETRY.- 39.
Page 40
... inches long . From a point C in it , half an inch from A , draw a line making an angle of 45 ° with C B ; at B draw a line making an angle of 75 ° with B C to meet it . 4. Draw a line 3 inches long . Divide it into 5 equal parts and on ...
... inches long . From a point C in it , half an inch from A , draw a line making an angle of 45 ° with C B ; at B draw a line making an angle of 75 ° with B C to meet it . 4. Draw a line 3 inches long . Divide it into 5 equal parts and on ...
Page 41
... inches , 23 inches and 2 inches . On the 3 inch side mark off any 3 irregular divisions , then divide the 2 inch side proportionally to the divisions on the 3 inch side . 23. Draw a line A B 33 inches long . Let this represent the base ...
... inches , 23 inches and 2 inches . On the 3 inch side mark off any 3 irregular divisions , then divide the 2 inch side proportionally to the divisions on the 3 inch side . 23. Draw a line A B 33 inches long . Let this represent the base ...
Page 43
... inches apart . and inches respec- 58. A B is a straight line 2 inches long . P is a point 2 inches from A and 3 inches from B. Describe a circle of 14 inches radius to pass through P and touch A B. 59. A and B are two circles of and 1 inch ...
... inches apart . and inches respec- 58. A B is a straight line 2 inches long . P is a point 2 inches from A and 3 inches from B. Describe a circle of 14 inches radius to pass through P and touch A B. 59. A and B are two circles of and 1 inch ...
Common terms and phrases
adjustment alidade angle of 30 back reading bearing Bisect chain line circle construct contour convenient curved describe an arc describe arcs diagonal scale diaphragm distance divided draw a line draw lines drawn Dumpy level edge error eye-piece feet field-book figure fixed flag foot foot-screws fore reading ground height hence horizontal plane inches inches long instrument intersection length Let A B line A B line of collimation line parallel magnetic magnetic bearing measured meridian method miles necessary needle object obtained offsets paper parallax parallelogram pencil perpendicular perspective projection picture plane placed Plane Geometry plane-table plotted position primary scale prism prismatic compass protractor radius describe rays rectangle reduced level regular polygon rhombus right angles screws sides sight-vane spirit level square staff station straight line surface survey surveyor telescope theodolite tion tracing tracing paper triangle Vernier scale vertical plane XY line
Popular passages
Page 61 - The base of a cone is the circle described by that side containing the right angle, which revolves. XXI. A cylinder is a solid figure described by the revolution of a rightangled parallelogram about one of its sides which remains fixed. XXII. The axis of a cylinder is the fixed straight line about which the parallelogram revolves.
Page 15 - A circle is a plane figure bounded by a curved line called the circumference, every point of which is equally distant from a point within called the center, Fig.
Page 21 - At a point in a given straight line to make an angle equal to a given angle. Let. A be the given point, AB the given line, and EFG the given angle.
Page 179 - Beneath the compass box, which is generally in one piece with the bar, is a conical axis passing through the upper of two parallel plates, and terminating in a ball supported in a socket. Immediately above this upper parallel plate is a collar, which can be made to embrace the conical axis tightly by turning the clamping screw E, and a slow horizontal motion may then be given to the instrument by means of the tangent screw D.
Page 62 - A cone is a body conceived to be formed by the revolution of a right-angled triangle about one of its sides containing the right angle.
Page 15 - What do you call a polygon of three sides ? Of four sides ? Of six sides ? &c. If the length of each side of triangle A is one inch, how long are the three sides together ? The sum of the sides of a polygon is its perimeter. Which of the...
Page 10 - When a straight line standing on another straight line, makes the adjacent angles equal to one another, each of these angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Page 22 - To construct an angle equal to a given number of degrees. The circumference of a circle is divided into 360 parts called degrees. The radius of a circle may be set off exactly six times round the circumference; hence if an arc be described and a portion cut off equal to the radius of the arc, an angle containing 60° will be obtained. With a knowledge of this principle a variety of angles such as 120°, 80°, 15°, 45°, 75°, may be constructed.
Page 15 - A Regular Polygon has all its sides and all its angles equal. — If they are not both equal, the polygon is irregular.
Page 150 - ... can not be altered if the sides remain constant, and that the three angles of a triangle are together equal to two right angles, so that if we know two of the angles of any triangle we can at once calculate the third angle by subtracting the number of degrees in the two known angles from 180 degrees...