Harper's Electricity Book for Boys
CHAPTER I.--SOME GENERAL EXPLANATIONS 3
AN INVISIBLE WORLD-POWER -- GENERATING ELECTRICITY -- WHAT A BOY CAN DO -- INEXPENSIVE TOOLS -- SOME PRACTICAL ADVICE
Harper's Electricity Book for Boys
AN INVISIBLE WORLD-POWER -- GENERATING ELECTRICITY -- WHAT A BOY CAN DO -- INEXPENSIVE TOOLS -- SOME PRACTICAL ADVICE