11. Q. What are some of the other best known works of Plato? A. “The Laws,” the “Symposium,” the “Phædrus,” the “Gorgias,” and the “Parmenides.” 12. Q. What is the name of the dialogue in which Plato tells of the end of Socrates? A. The “Phædo.” 13. Q. What was the sentence of antiquity in regard to Plato? A. That Zeus, if he had spoken Greek, would have spoken it like Plato. 14. Q. Who was a distinguished pupil of Plato? A. Aristotle, and in influence on human thought he equaled and rivaled his master. 15. Q. How does our author state the difference between ancient tragedy and modern, in a single antithetical sentence? A. Modern tragedy presents real life idealized; ancient tragedy presents an ideal life realized. 16. Q. What did Greek tragedy have for its chief purpose? A. To teach. 17. Q. How were Greek tragedies represented? A. By daylight, in the open air, before assemblages that numbered their tens of thousands of spectators. 18. Q. What is said of the dress of the actors? A. The actors wore masks on their faces and buskins on their feet. Beside this they wore a kind of wig designed to make them look taller, and dressed with padding to make them look larger. 19. Q. Who were the three masters of Greek tragedy? A. Æschylus, Sophocles and Euripides. 20. Q. When and where was Æschylus born? A. In 525 B. C., in an Attic village near Athens. 21. Q. In the present volume, from what tragedy of Æschylus are selections presented? A. “Prometheus Bound.” 22. Q. Who was Prometheus? A. A mythical being of superhuman rank, who stole fire from heaven and brought it to men. For this offense against Zeus he was condemned to be chained alive to a rocky cliff in the Caucasus. 23. Q. What other great tragic poet was contemporary with Æschylus? A. Sophocles. 24. Q. From what masterpiece of Sophocles are the selections of the present volume made? A. “Œdipus Tyrannus, or Œdipus the King.” 25. Q. How is this tragedy considered by, perhaps, the majority of qualified critics? A. To be not only the best work of Sophocles, but the “bright, consummate flower” of all Greek tragedy. II.—TWENTY-FIVE QUESTIONS AND ANSWERS ON “CHEMISTRY”—FROM BEGINNING OF BOOK TO PAGE 84. 26. Q. Of what does chemistry treat? A. All kinds of material substances. 27. Q. What is said of the number of the various kinds of matter already existing on our earth? A. The number is so great that the various kinds have never been so much as counted, much less described, in any list or volume. 28. Q. Of what are all things known to chemists made up? A. A few simple substances, either existing alone or in richly various combinations. 29. Q. What are called chemical elements, and what compounds? A. The simplest substances when alone are called the chemical elements, or elementary substances; the things resulting when different elements are united are called compounds.