For particulars, I may refer him to the sixth chapter of my "History of the Intellectual Development of Europe." EUCLID--ARCHIMEDES.

It has just been remarked that the Stoical philosophy doubted whether the mind can ascertain absolute truth.

While Zeno was indulging in such doubts, Euclid was preparing his great work, destined to challenge contradiction from the whole human race.

After more than twenty-two centuries it still survives, a model of accuracy, perspicuity, and a standard of exact demonstration.

This great geometer not only wrote on other mathematical topics, such as Conic Sections and Porisms, but there are imputed to him treatises on Harmonics and Optics, the latter subject being discussed on the hypothesis of rays issuing from the eye to the object.
With the Alexandrian mathematicians and physicists must be classed Archimedes, though he eventually resided in Sicily.