y to redden the skin, and affect the flesh of
persons, even at some considerable distance, and it is a most powerful
germicide, destroying bacteria, and has been found also to produce some
remarkable cures in diseases of a cancerous nature.

The remarkable similarity of the rays propagated by this substance, with
the X-rays, lead many to believe that they are electrical in their
character, and the whole scientific world is now striving to use this
substance, as well as the more familiar light waves of the Roentgen
tube, in the healing of diseases.

It is not at all remarkable that this use of it should first be
considered, as it has been the history of the electrical developments,
from the earliest times, that each successive stage should find
advocates who would urge its virtues to heal the sick.

It was so when the dynamo was invented, when the high tension current
was produced; and electrical therapeutics became a leading theme when
transmission by induction became recognized as a scientific fact.

It is not many years since the X-rays were discovered, and the first
announcement was concerning its wonderful healing powers.

This was particularly true in the case of radium, but for some reason,
after the first tests, all experimenters were thwarted in their
theories, because the science, like all others, required infinite
patience and experience. It was discovered, in the case of the X-ray,
that it must be used in a modified form, and accordingly, various
modifications of the waves were introduced, called the _m_ and the _n_
rays, as well as many others, each having some peculiar qualification.

In time, no doubt, the investigators will find the right quality for
each disease, and learn how to apply it. Thus, electricity, that most
alluring thing which, in itself, cannot be seen, and is of such a
character that it cannot even be defined in terms which will suit the
exact scientific mind, is daily bringing new wonders for our
investigation and use.

It is, indeed, a study which is so broad that it has no limitations, and
a field which never will be exhausted.

THE END

GLOSSARY OF WORDS
USED IN TEXT OF THIS VOLUME

Acid. Accumulator material is sulphuric acid, diluted
with water.

Active That part of the material in accumulator plates
Material. which is acted upon by the electric current.

Accumulator. A cell, generally known as a storage