We use electricity to move things with the help of motors and magnets all the time. But if you have enough voltage, you can move things with voltage alone. As [James] found out, though, it works be… ...

We use it every day, but most of us haven't got a clue how electricity makes things work. What's going on in the wires that make motors move, and heaters heat?

This article was originally published with the title “ Powerful Electromagnet for the Use of Oculists ” in Scientific American Magazine Vol. 105 No. 26 (December 1911), p. 573 doi:10.1038 ...