Who said "Discovery is 90% perspiration, 10% inspiration."?

This quote is attributed to Karl Landsteiner.

Discovery is 90% perspiration, 10% inspiration. - Karl Landsteiner

"Discovery is 90% perspiration, 10% inspiration."

Karl Landsteiner Work

Immunologist Austrian-American 1868–1943

"Science is organized knowledge."

"The unknown is always feared."

"Discovery requires curiosity and patience."

"Blood types reveal the hidden connections between humanity."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."