Note 216 — MEMOIR OF THE LIFE OF DAVID RITTENHOUSE; CONTINUED, FROM THE TIME OF HIS SETTLEMENT IN PHILADELPHIA.
Reading edition
“Principem Philosophorum,” in the original:—Such was the appellation (Principes Philosophorum) by which Cicero honours Pythagoras, Democritus, Plato, Xenocrates, Zeno, Cleanthes, Diogenes the Stoic; men, among others, whose usefulness (he observes) old age might diminish, but not destroy.