# Did Robert Millikan come up with the atomic structure?

The link describes the experiment better than I could do. Their experiment was so sophisticated (and this in 1921) that their reported value, $1.5924 \left(10\right) \times {10}^{- 19} \cdot C$ is quite comparable to the best current value, $1.602176487 \left(40\right) \times {10}^{- 19} \cdot C$. Their experiment on oil drops found that the charge were small integer multiples of this value (because the oil drops were charged with 1 or several extra electrons).