| On Land and Sea at the Dardanelles
T. C. Bridges | |
| On Liberty
John Stuart Mill | |
| On Limitations to the Use of Some Anthropologic Data
John Wesley Powell | |
| On Love
Stendhal | |
| On Molecular and Microscopic Science, Volume 1 (of 2)
Mary Somerville | |
| On Molecular and Microscopic Science, Volume 2 (of 2)
Mary Somerville | |
| On Mr. Spencer's Data of Ethics
Malcolm Guthrie | |
| On Mule Back Thru Central America with the Gospel
Mattie Crawford | |
| On Naval Timber and Arboriculture / With Critical Notes on Authors who have Recently Treated the Subject of Planting
Patrick Matthew | |
| On Nothing & Kindred Subjects
Hilaire Belloc |
