ILLUSTRATIONS
Reading edition
Harold Sending the C. Q. D. Message Frontispiece
FACING PAGE
Testing a Generator 8
Wiring 16
Wattmeter 40
Testing the Telegraphy Outfit 62
Electric Bell 72
Feeling Electricity 174
Operating the Switchboard 204
Induction Coil of a Wireless 330
ELECTRICITY AND ITS EVERYDAY USES