# Did Robert Millikan's results impact on determining the charge of an electron?

The oil drop experiment is famous, and provided a means to measure electronic charge. Millikan and his students must have been consummate experimentalists, and he was able to show that the electric charge of oil-drop were all small integer multiples of a certain base value, i.e. $1.60 \times {10}^{-} 19$ $C$, which was the electronic charge.