Note 888 — XVI. OF FREETHINKERS.853
Henri Van Laun translation
The atomic system of philosophy started by Leucippus, and adopted by Epicurus, Democritus, and many other philosophers, was that the universe, material and mental, consisted of minute, indivisible, and impenetrable atoms, which atoms were assumed to be the ultimate ground of nature, whilst necessity was supposed to be the cause of all existence.