Mechanical Drawing Self-Taught Comprising instructions in the selection and preparation of drawing instruments, elementary instruction in practical mechanical drawing; together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers

CHAPTER I.

Chapter 145 wordsPublic domain

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