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

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

Discovery of Oxygen, Part 2

The History of University Education in Maryland The Johns Hopkins University (1876-1891). With supplementary notes on university extension and the university of the future

History of Liberia Johns Hopkins University Studies in Historical and Political Science