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Testing and selecting India ink
30
Draftsmen's measuring rules
33
CHAPTER II.
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
CHAPTER III.
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
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