Physics

E. Laas ("Annual Report of the Friedrichs-Gymnasium in Berlin," 1863), E. Gotschlich (in "Fleckeisen, Yearbooks," Vol. 105 (1872), p. 618 and Vol. 107 (1874), p. 109), Gerling ("On Zeno's Paralogism," Marburg, 1825), Ed. Zeller ("Philosophy of the Greeks," Vol. III). Some emendations, which I proposed in my earlier edition (Leipzig, 1854, published by Engelmann), I have received into the text as they still meet my approval, while others I have omitted.

C. P.