Alan Mays' photos with the keyword: batteries

The choice of a nation. Red Seal Dry Battery. Guaranteed for all open circuit work. For ignition and all other work requiring high amperage. Red Seal Dry Battery. For ignition and all work requiring high amperage. Positively guaranteed for all open circuit work. A battery suitable for every use. Battery of 5 dry cells connected in series. Voltage about 7½. Amperage above 20. Battery of 10 dry cells connected in multiple series. Voltage about 7½. Amperage above 40. The guarantee protects you. Ideal Auto Co., 19-21 S. 9th St., Lebanon, Pa. 1919. 1920.

"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."