The separate threads of the tassel, being each electrified with the same
kind of electricity, repel one another, and thus the tassel branches out
as in the photograph.]
[Illustration: SILK TASSEL DISCHARGED BY THE RAYS FROM RADIUM
When the radium rays, carrying an opposite electric charge to that on
the tassel, strikes the threads, the threads are neutralised, and hence
fall together again.]
[Illustration: A HUGE ELECTRIC SPARK
This is an actual photograph of an electric spark. It is leaping a
distance of about 10 feet, and is the discharge of a million volts. It
is a graphic illustration of the tremendous energy of electrons.]
[Illustration: _From "Scientific Ideas of To-day_."