The Theory of Environment An Outline of the History of the Idea of Milieu, and Its Present Status, part 1

"My country, 'tis of thee!" Or, the United States of America; past, present and future. A philosophic view of American history and of our present status, to be seen in the Columbian exhibition.

Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives Dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Faculty of Pure Science of Columbia University

Slavery in Pennsylvania A Dissertation Submitted to the Board of University Studies of the Johns Hopkins University in Conformity with the Requirements for the Degree of Doctor of Philosophy, 1910

The Transformation of Early Christianity from an Eschatological to a Socialized Movement A Dissertation Submitted to the Faculty of the Graduate School of Arts and Literature in Candidacy for the Degree of Doctor of Philosophy

The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895