Archimedes of Syracuse was a Greek mathematician, physicist, engineer, inventor, and astronomer. Although few details of his life are known, he is regarded as one of the leading scientists in classical antiquity.
On Floating Bodies
Archimedes wrote On Floating Bodies (Greek: Περὶ τῶν ἐπιπλεόντων σωμάτων), a Greek-language work consisting of two books thought to have been written around 250 BC that survives only partly in Greek, the rest in medieval Latin translation from the Greek. It is the first known work on hydrostatics, of which Archimedes is recognized as the founder. The purpose of On Floating Bodies was to determine the positions that various solids will assume when floating in a fluid, according to their form and the variation in their specific gravities. It contains the first statement of what is now known as Archimedes' principle.