The Fifteen Watt Tungsten Lamp

On the Existence of Active Oxygen Thesis Presented for the Attainment of the Degree of Doctor of Philosophy at the Johns Hopkins University

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

Education in England in the Middle Ages Thesis Approved for the Degree of Doctor of Science in the University of London