who shouted eureka and jumped out of the bath
Eureka (word) The exclamation 'Eureka!' is attributed to the ancient Greek scholar Archimedes. He reportedly proclaimed "Eureka! Eureka!" after he had stepped into a bath and noticed that the water level rose, whereupon he suddenly understood that the volume of water displaced must be equal to the volume of the part of his body he had submerged. (This relation is not what is known as Archimedes' principleâ€”that deals with the upthrust experienced by a body immersed in a fluid.[2][3]) He then realized that the volume of irregular objects could be measured with precision, a previously intractable problem. He is said to have been so eager to share his discovery that he leapt out of his bathtub and ran naked through the streets of Syracuse.
Don't throw the baby out with the bathwater Some claim the phrase originates from a time when the whole household shared the same bath water.[9] The head of household (Lord) would bathe first, followed by the men, then the Lady and the women, then the children, followed lastly by the baby. The water would be so black from dirt that a baby could be accidentally "tossed out with the bathwater".[9] Others state there is no historical evidence that there is any connection with the practice of several family members using the same bath water, the baby being bathed last.[10]