Note 9 — HOME STUDIES IN CHEMISTRY AND PHYSICS.

“Archimedes,” ark-i-mēˈdes. (B. C. 287-212.) The most celebrated mathematician of antiquity. Cicero and Livy both refer to him in their writings, the former to his aptness in solving problems, the latter to his ingenuity in the invention of warlike engines. The law referred to was, that a body plunged in water loses as much weight as is equal to the weight of an equal body of water. King Hiero suspected that a gold crown had been alloyed with silver, and asked Archimedes to test it. He was trying to find some means by which he could decide the matter, when going one day to the bath tub he found it full, and immediately saw that as much water must run over the tub as was equal to the bulk of his body. He saw at once a method for determining the matter of the crown, and crying “Eureka, eureka; I have found it, I have found it,” he ran home.