CHAPTER I.✦

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

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