But you must remember that we do not know what electricity itself really is. We only know how to produce it by certain methods, and we also know what we can do with it when we have obtained it.
In this little book we will try to explain the various ways by which electricity is obtained, and how it is applied to produce the useful results that we see around us.
We will try and make this explanation such that it will encourage many of you to study this very important and interesting subject more deeply.
In the advanced books on electricity there are many technical terms which are somewhat difficult to understand, but in this book it will only be necessary to use a few of the more simple ones, which it will be well for you to learn and understand before going further.
II
DEFINITIONS
The three measurements most frequently used in electricity are
The Volt,
The Ampère,
The Ohm.