Eureka (word) "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' principle—that deals with the "upthrust" experienced by a body immersed in a fluid.) 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
Eureka, Nevada mine production and changing market conditions led to the closing of mines. The town was serviced by the narrow gauge Eureka and Palisade Railroad from 1873 to 1938. Eureka is served by an all-volunteer fire department, which provides fire protection, rescue, and vehicle rescue services for Eureka and the surrounding areas. In 2009 a new brick and steel fire house was built on Main Street in Eureka. At the time of its building it was the second largest fire house in the state. In addition to being a modern fire fighting facility, it contains a museum of Eureka fire department