ROBERT KENNEDY DUNCAN. _The New Knowledge._ A popular exposition of theories of matter that have developed since the discovery of radioactivity. Intelligible to any (intelligent) high-school pupil. EPICTETUS. _Discourses._ The English translation in _Bohn’s Library_. FRANCIS GALTON. _Natural Inheritance._ _Inquiries into Human Faculty._ The second volume is in _Everyman’s Library_. ARCHIBALD GEIKIE. _Class-Book of Geology._ HENRY GEORGE. _Our Land and Land Policy._ _The Science of Political Economy._ ASA GRAY. _Manual of the Botany of the Northern United States._ ARTHUR TWINING HADLEY. _The Education of the American Citizen._ HERMANN LUDWIG FERDINAND VON HELMHOLTZ. _Popular Lectures on Scientific Subjects._ In the English translation by Edmund Atkinson with Helmholtz’s “Autobiography” and an introduction by Tyndall. KARL HILTY. _Happiness: Essays on the Meaning of Life._ Translated by Francis Greenwood Peabody. WILLIAM TEMPLE HORNADAY. _The American Natural History._ CHARLES DE FOREST HOXIE. _How the People Rule; Civics for Boys and Girls._ THOMAS HENRY HUXLEY. _Darwiniana._ _Evolution and Ethics._ _Man’s Place in Nature._ Huxley is the greatest man of letters among modern English men of science. A volume of his essays is in _Everyman’s Library_. ERNEST INGERSOLL. _Book of the Ocean._ Especially for young people. HAROLD JACOBY. _Practical Talks by an Astronomer._ WILLIAM JAMES. _The Principles of Psychology._ _The Will to Believe._ HERBERT KEIGHTLY JOB. _Among the Water-Fowl._ DAVID STARR JORDAN. _True Tales of Birds and Beasts._ Especially for young readers. WILLIAM THOMSON (Lord Kelvin). _Popular Lectures and Addresses._ HENRY DEMAREST LLOYD. _Wealth Against Commonwealth._ An important work on modern economic and business problems. JOHN STUART MILL. _On Liberty._ _Principles of Political Economy._ JOHN MORLEY. _On Compromise._ HUGO MÜNSTERBERG. _Psychology and Life._ _On the Witness Stand._ FREDERIC WILLIAM HENRY MYERS. _Science and a Future Life._ SIMON NEWCOMB. _Astronomy for Everybody._ GEORGE HERBERT PALMER. _The Field of Ethics._ _The Nature of Goodness._ WALTER HORATIO PATER. _Plato and Platonism._ FRIEDRICH PAULSEN. _Introduction to Philosophy._ The excellent English translation affords within easy compass a view of philosophy equal to several elementary courses in philosophy at a university. It may be begun by any young man or woman of, say, eighteen. PLATO. _Dialogues._ The “Republic” is in _Everyman’s Library_ and in other cheap editions. Several of the dialogues are to be found under the title, “Trial and Death of Socrates” in the _Golden Treasury Series_. See also Walter Pater’s “Plato and Platonism.” The great Plato in English is Jowett’s. JACOB AUGUST RIIS. _The Battle with the Slum._ _How the Other Half Lives._ _The Children of the Poor._ Among the most sensible, sympathetic and human of modern works on sociology.