How a spritz of oil from a perfume bottle let scientists measure the charge of an electron

Can you find the charge of an electron in a spritz of oil? It seems like the subatomic world is too tiny ever to be meaningfully measured. But that's exactly what two scientists did in 1909. Find out how, with a box, a microsocope, a spritz of oil, and a sensitive voltage meter, people figured out the charge of an… »1/28/12 12:00pm1/28/12 12:00pm