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Read Ebook: Conservation Archaeology of the Richland/Chambers Dam and Reservoir by Moir Randall W Raab L Mark
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Ebook has 413 lines and 39130 words, and 9 pages
THE DRAWING BOARD.
The T square 18
The triangles 19
Curves 21
Selecting and testing drawing instruments 22
Lead pencils 23
Mixing India ink 25
The drawing paper 26
Tracing paper 29
The ink 30
Testing and selecting India ink 30
Draftsmen's measuring rules 33
THE PREPARATION AND USE OF THE INSTRUMENTS.
Preparing the lining pen for use 34
The shapes of the lining pen points 35
Oil stoning pen points 36
Preparing the circle pen for use 38
The shape for circle pen points 38
Shaping circle pens for very small circles 39
A form of pen point recently introduced; forming the pen point 39
The method of oil-stoning circle pen points 40
The needle point and pen point 42
How to use the circle pen 43
German instrument to avoid slipping of a needle point 44
How to use the lining pen 45
Applying the ink to the bow-pen 46
Using a straight line or lining pen with a T square 47
LINES AND CURVES.
Explanation of simple geometrical terms; radius; explanation of conventional dotted lines 48
A line at a right angle to another; a point; parallel lines 49
A line produced; a line bisected; a line bounding a circle; an arc of a circle; segments of a circle; the chord of an arc; a quadrant of a circle 50
A sector of a circle; a line tangent to a circle; a semicircle; centre of a circle; axis of a cylinder; to draw a circle that shall pass through three given points 51
To find the centre from which an arc of a circle has been struck; the degrees of a circle 52
The protractor 53
To find the angle of one line to another 54
To find the angles of three lines one to the other 55
Acute angles and obtuse angles 57
Triangles; right angle triangle; obtuse angle triangle; equilateral triangle; isosceles triangle 58
Scalene triangle; a quadrangle; quadrilateral or tetragon 59
Rhomboid; trapezoid; trapezium 60
The construction of polygons 61
The names of regular polygons 62
The angles of regular polygons; the ellipse 63
Form of a true ellipse 69
The use of a trammel for drawing an ellipse 72
To draw a parabola mechanically 73
To draw a parabola by lines 74
To draw a heart cam 75
SHADOW LINES AND LINE-SHADING.
Section lining or cross-hatching 77
To represent cylindrical pieces one within the other; to represent a number of pieces one within the other 78
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