2 -.6875
--------
Substituting values,      2        =  .66. 
Now of course you understand all about that, but it is Greek to some
people.

So you see I have no apologies to make for following out my plain comprehensive talk, have not confused you, or lead you to believe that it requires a great amount of study to become an engineer.  I mean a practical engineer, not a mechanical engineer.  I just touch mechanical engineering to show you that that is something else.  If you are made of the proper stuff you can get enough out of this little book to make you as good an engineer as ever pulled a throttle on a traction engine.  But this is no novel.  Go back and read it again, and ever time you read it you will find something you had not noticed before.

Index
-----

Part first                                  page
Tinkering Engineers . . . . . . . . . . .  5
Part second
Water Supply . . . . . . . . . . . . . .  31
Part third
What a Good Injector Ought to Do  . . .   45
The Blower . . . . . . . . . . . . . . .  49
A Good Fireman  . . . . . . . . . . . .   51
Wood . . . . . . . . . . . . . . . . . .  56
Why Grates Burn Out . . . . . . . . . .   57
Part four
Scale  . . . . . . . . . . . . . . . . .  65
Clean Flues . . . . . . . . . . . . . .   67
Part five
Steam Gauge  . . . . . . . . . . . . . .  72
How to Test a Steam Gauge . . . . . . .   74
Fusible Plug . . . . . . . . . . . . . .  76
Leaky Flues . . . . . . . . . . . . . .   79
Part six
Knock in Engine  . . . . . . . . . . . .  90
Lead  . . . . . . . . . . . . . . . . .   92
Setting a Valve  . . . . . . . . . . . .  94
How to Find the Dead Center . . . . . .   95
Lubricating Oil  . . . . . . . . . . . . 103
A Hot Box . . . . . . . . . . . . . . .  109
Part seven
A Traction Engine on the Road  . . . . . 111
Sand  . . . . . . . . . . . . . . . . .  122
Friction Clutch . . . . . . . . . . . .  124
Something About Sight-Feed Lubricators   132
Two Ways of Reading . . . . . . . . . .  137
Some Things to Know  . . . . . . . . . . 139
Things Handy for an Engineer  . . . . .  159
Something About Pressure . . . . . . . . 184