| On Old-World Highways / A Book of Motor Rambles in France and Germany and the Record of a Pilgrimage from Land's End to John O'Groats in Britain
Thos. D. Murphy | |
| On Our Selection
Steele Rudd | |
| On Patrol
John Graham Bower | |
| On Picket Duty, and Other Tales
Louisa May Alcott | |
| On poetic interpretation of nature
John Campbell Shairp | |
| On prayer and the contemplative life
Saint Aquinas Thomas | |
| On reading in relation to literature
Lafcadio Hearn | |
| On Revenues
Xenophon | |
| On Sameness and Identity: A Psychological Study / Being a Contribution to the Foundations of a Theory of Knowledge
George Stuart Fullerton | |
| On Secret Service / Detective-Mystery Stories Based on Real Cases Solved by Government Agents
William Nelson Taft |
