According to the list given by Pausanias, there were upward of seventy in each of the two pictures. In that representing the taking of Troy Polygnotos had brought together many incidents described in the Cyclic epics: Menelaos Agamemnon, Ulysses, Nestor, Neoptolemos, Antenor, Helen, Andromache, Kassandra, and many other figures, with which the Homeric poems have made us familiar, all appeared united in one skillful composition, arranged in groups. The other picture, the descent of Ulysses into Hades to interrogate Teiresias, might be called a pictorial epic of Hades. On one side was the entrance, indicated by Charon's boat crossing: the Acheron, and the evocation of Teiresias by Ulysses, besides the punishment of Tityos and other wicked men; on the other side were Tantalos and Sisyphos. Between these scenes, on the flanks, were various groups of heroes and heroines from the Trojan and other legends. From the remarks of ancient critics, it might be inferred that the genius of Polygnotos, like that of Giotto, was far in advance of his technical skill. Aristotle called him the most ethical of painters, and recommended the young artist to study his works in preference to those of his contemporary Pauson, who was ignobly realistic, or those of Zeuxis, who had great technical merit, but was deficient in spiritual conception. The course will comprise four more lectures, as follows--November 17, "Greek Painters from B.C. 460 to Accession of Alexander the Great B.C. 336--Apollodoros, Zeuxis, Parrhasios, Pamphilos, Aristides;" November 24, "Greek Painters from Age of Alexander to Augustan Age--Apelles, Protogenes, Theon;" December 1, "Pictures on Greek Fictile Vases;" December 15, "Mural Paintings from Pompeii, Herculaneum, and other Ancient sites." * * * * * The new Iowa State Capitol has thus far cost $2,000,000, and it will require $500,000 to finish it. It is 365 feet long fron north to south, and measures 274 feet from the sidewalk to the top of the central dome. * * * * * [LONGMAN'S MAGAZINE.] ATOMS, MOLECULES, AND ETHER WAVES. By JOHN TYNDALL, F.R.S. I.