Erasistratus 300-260 B.C.
Erasistratus likewise was a Greek physician who became an outstanding anatomist in Alexandria. He devised the first crude respiration calorimeter. No complete textual records are extant. He was probably a student of Theophrastus.
Roman World as the Center of Intellectual Accomplishment
With the decline of influences of the Ptolomaic kings in Egypt and the transfer of military superiority to the Roman Empire, various individuals became distinguished for their agricultural accomplishments. The first of these was Marcus Porcius Cato.