Alan Mays' photos with the keyword: experiments

"Fun with Dry Batteries. Price 10¢. For the Amateur Electrician. " Title page: Fun with Dry Batteries: A Handbook of Things to Make and Things to Do with Dry Batteries . Published by the manufacturers of Eveready Long Life Batteries. From an ad for the book in Popular Mechanics , Dec. 1933, advertising section, p. 6A: "Electricity. Get this 96-page book. Boys--and grown-ups, too--will find 'Fun with Dry Batteries' a most instructive and entertaining little book. Make electro-magnets, bells, buzzers, signals, lights, secret locks, electro-plating outfits, telegraph instruments, and numerous amusing electric toys. Has simple, illustrated description of principles of electricity--and of dry batteries in particular."