How Two Boys Made Their Own Electrical Apparatus
Reading edition
Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity BY THOMAS M. ST. JOHN, Met. E. Author of "Fun With Magnetism," "Fun With Electricity," "The Study of Elementary Electricity and Magnetism by Experiment," "Things A Boy Should Know About Electricity," etc.
EIGHTH EDITION
THOMAS M. ST. JOHN CASCADE RANCH
East Windham New York
COPYRIGHT, 1898, BY THOMAS M. ST. JOHN