Duncan, Robert K.: The Chemistry of Commerce.

The New Knowledge.

Duruy, Victor: History of France.

History of the Middle Ages.

History of Rome.

Edman, Erwin: Human Traits.

Elliot, G. F. Scott: Prehistoric Man and His Story.

Ely, Richard T.: Evolution of Industrial Society.

Emerton, Ephraim: Introduction to the Middle Ages.

Mediaeval Europe.

Fisher, George P.: History of the Christian Church.

Fowler, Ward: The City State of the Greeks and Romans.

Gardiner, Samuel R.: The Puritan Revolution.

Gibbon, Edward: Decline and Fall of the Roman Empire.

Goldenweiser, Alexander A.: Early Civilization.

Gordon, Childe: The Dawn of European Civilization.

Green, John Richard: A Short History of the English People.

Green, William Chase: The Achievement of Greece.

Guizot, F.: History of Civilization.

Hadley, James: Introduction to Roman Law.

Hayes, Carlton J. H.: A Brief History of the Great War.

A Political and Social History of Modern Europe.

Henderson, Ernest F.: History of Germany in the Middle Ages.

Hobson, J. A.: The Problems of the New World.

Hodgkin, Thomas: Italy and Her Invaders.

Holm, Adolph: History of Greece.

Hudson, J. W.: The College and New America.

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Ihne, W. H.: Early Rome.

Inge, W. R.: The Idea of Progress.

Irving, Washington: The Conquest of Granada.

James, E. O.: An Introduction to Anthropology.

Kelsey, Carl: The Physical Basis of Society.

Keynes, J. M.: The Economic Consequences of the Peace.

King, L. W.: A History of Babylon.

A History of Sumer and Akkad.

Kirkup, Thomas: The History of Socialism.

Kitchen, G. W.: History of France.

Kroeber, A. L.: Anthropology.

Lawrence, I. J.: The Society of Nations.

Libby, Walter: An Introduction to the History of Science.

Lipton, Walter: Drift and Mastery.

Liberty and the News.

Lowell, A. Lawrence: Public Opinion and Popular Government.

Lowie, Robert H.: Culture and Ethnology.

Primitive Society.

Mahaffy, J. P.: The Story of Alexander's Empire.

Mason, Otis Tufton: The Origins of Inventions.

Mason, Wm. A.: The History of the Art of Writing.

May, Thos. E.: Democracy in Europe.

McCarthy, Justin: The Epoch of Reform.

McGiffert, Arthur C.: The Rise of Modern Religious Ideas.

Meyers, J. L.: The Dawn of History.

Mills, John: Within the Atom.