By: Nicholas Matocha
Robert made multiple discoveries in the three fields of optics, electricity, and molecular physics. His most famous discovery was when he figured out the charge of an electron. He determined the electrons charge through the "oil-drop method". He also found that all electrons have the same charge no matter the type of element.
Robert married Greta Blanchard in 1902, he also had three boys. Robert passed away on December 19, 1953, in San Marino, California.