Modern history

The Romance of Western History ...

Mathematical Investigations in the Theory of Value and Prices

Mediaeval history

Why is the Dollar Shrinking?: A Study in the High Cost of Living

Appreciation and Interest: A Study of the Influence of Monetary Appreciation and Depreciation on the Rate of Interest with Applications to the Bimetallic Controversy and the Theory of Interest

Baccalaureate Addresses, and Other Talks on Kindred Themes

Railroad Transportation, Its History and Its Laws

The Beginnings of Christianity with a View of the State of the Roman World at the Birth of Christ

Outlines of Universal History: Designed as a Text-book and for Private Reading

The Rate of Interest: Its Nature, Determination and Relation to Economic Phenomena

The Grounds of Theistic and Christian Belief

In Good Health Magazine

The Nature and Method of Revelation

Ancient and mediæval history

Faith and Rationalism: With Short Supplementary Essays on Related Topics

Impending Problems of Eugenics

The Purchasing Power of Money ...

Economics: An Account of the Relations Between Private Property and Public Welfare

America's Interest in World Peace