I have translated from my own text published in the Bibliotheca Oxoniensis in 1898, but in the — J fear numerous places, where I have since altered my opinion, I have taken what I now believe to be the right reading or the best suggestion and added the warning of a foot note. I have appended some notes for the general reader, which are intended either to explain allusions or to elucidate what seemed to me difficult or obscure passages in the light of the general Epicurean theory.