“Land ho!” yelled the curator, waking them all up. “Here’s Aru, boys, dead ahead, and we’ve beaten our proa that was to have come for us by two days!”
THE END
HARPER’S
“TELL-ME-HOW” SERIES
HARPER’S EVERY-DAY ELECTRICITY
By Don Cameron Shafer
Describes all electrical apparatus in common use. Each chapter contains various examples and experiments, amply illustrated with line-drawings.
HARPER’S WIRELESS BOOK
By Alpheus Hyatt Verrill
Part I deals with Principles and Mechanism of Wireless; Part II, Operation and Use of Wireless; Part III, Wireless Telephone; Part IV, Wireless Power Transmission.