The physician claimed that bumps on the skull were correlated with intelligence and personality traits.

The answer is "Franz Gall."

Gall is famously known as the most understood researchers of the eighteenth century, Franz Josef Gal was a famous anatomist, and physiologist. He was most broadly known for his ideas of localised capacities in the brain, and cranioscopy (later alluded to as phrenology).

Joke: i thought it said drake and josh at first answer: probably unsure about this law. depending on how long the time is.