- On a Torn-Away World; Or, the Captives of the Great EarthquakeAuthor: Rockwood, RoyLanguage: English
- On Being HumanAuthor: Woodrow WilsonLanguage: English
- On Board the Esmeralda: Martin Leigh's Log - A Sea StoryAuthor: Hutcheson, John C. (John Conroy), William Heysham OverendLanguage: English
- On Books and the Housing of ThemAuthor: W. E. (William Ewart) GladstoneLanguage: English
- On Christmas Day In The EveningAuthor: Grace S. (Grace Smith) Richmond, C. M. (Charles M.) RelyeaLanguage: English
- On Christmas Day in the MorningAuthor: Grace S. (Grace Smith) Richmond, C. M. (Charles M.) RelyeaLanguage: English
- On CommandoAuthor: Dietlof Van WarmeloLanguage: English
- On CompromiseAuthor: John MorleyLanguage: English
- On Conducting (Üeber Das Dirigiren) : A Treatise on Style in the Execution of Classical MusicAuthor: Richard Wagner, Edward DannreutherLanguage: English
- On English Homophones: Society for Pure English, Tract 02Author: Robert BridgesLanguage: English
- On Handling the DataAuthor: Mayfield, M. I., Kelly FreasLanguage: English
- On Heroes, Hero-Worship, and the Heroic in HistoryAuthor: Thomas CarlyleLanguage: English
- On HorsebackAuthor: Charles Dudley WarnerLanguage: English
- On HorsemanshipAuthor: Xenophon, Henry Graham DakynsLanguage: English
- On Laboratory ArtsAuthor: Threlfall, RichardLanguage: English
- On Land and Sea at the DardanellesAuthor: T. C. (Thomas Charles) BridgesLanguage: English
- On Limitations to the Use of Some Anthropologic DataAuthor: John Wesley PowellLanguage: English
- On Nothing & Kindred SubjectsAuthor: Hilaire BellocLanguage: English
- On Our SelectionAuthor: Steele RuddLanguage: English
- On Picket Duty, and Other TalesAuthor: Louisa May AlcottLanguage: English
- On prayer and the contemplative lifeAuthor: Thomas, Aquinas, Saint, Hugh PopeLanguage: English
- On RevenuesAuthor: Xenophon, Henry Graham DakynsLanguage: English
- On Some Fossil Remains of ManAuthor: Thomas Henry HuxleyLanguage: English
- On SomethingAuthor: Hilaire BellocLanguage: English
- On the Advisableness of Improving Natural KnowledgeAuthor: Thomas Henry HuxleyLanguage: English
- On the Antiquity of the Chemical ArtAuthor: Mactear, JamesLanguage: English
- On The Art of ReadingAuthor: Arthur Quiller-CouchLanguage: English
- On the Art of Writing: Lectures delivered in the University of Cambridge 1913-1914Author: Arthur Quiller-CouchLanguage: English
- On the Banks of the AmazonAuthor: William Henry Giles Kingston, William H. C. GroomeLanguage: English
- On The BlockadeAuthor: Oliver Optic, L. J. (Lewis Jesse) BridgmanLanguage: English
- On the Choice of BooksAuthor: Thomas Carlyle, Richard Herne ShepherdLanguage: English
- On the Church StepsAuthor: Sarah C. HallowellLanguage: English
- On the Decay of the Art of LyingAuthor: Mark TwainLanguage: English
- On the Duty of Civil DisobedienceAuthor: Henry David ThoreauLanguage: English
- On the Economy of Machinery and ManufacturesAuthor: Charles BabbageLanguage: English
- On the Edge of the Arctic; Or, An Aeroplane in SnowlandAuthor: H. L. (Harry Lincoln) Sayler, Hall, N. P. [Illustrator]Language: English
- On the Edge of the War Zone: From the Battle of the Marne to the Entrance of the Stars and StripesAuthor: Mildred AldrichLanguage: English
- On the eve: A novelAuthor: Ivan Sergeevich Turgenev, Constance GarnettLanguage: English
- On the Evolution of Language: First Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1879-80, Government Printing Office, Washington, 1881, pages 1-16Author: John Wesley PowellLanguage: English
- On the Firing LineAuthor: Anna Chapin Ray, Fuller, Hamilton BrockLanguage: English
- On the Firing Line in EducationAuthor: Ladd, Adoniram JudsonLanguage: English
- On the Fringe of the Great FightAuthor: George Gallie NasmithLanguage: English
- On the FrontierAuthor: Bret HarteLanguage: English
- On the Genesis of SpeciesAuthor: St. George Jackson MivartLanguage: English
- On the Heels of De WetAuthor: Lionel JamesLanguage: English
- On the Improvement of the UnderstandingAuthor: Benedictus de Spinoza, R. H. M. (Robert Harvey Monro) ElwesLanguage: English
- On the Indian Sect of the JainasAuthor: Georg Bühler, James BurgessLanguage: English
- On the Indian Trail: Stories of Missionary Work among Cree and Salteaux IndiansAuthor: Egerton Ryerson YoungLanguage: English
- On the Irrawaddy: A Story of the First Burmese WarAuthor: G. A. (George Alfred) Henty, William Heysham OverendLanguage: English
- On the King's Service: Inward Glimpses of Men at ArmsAuthor: Logan, InnesLanguage: English
- On the Method of Zadig: Essay #1 from "Science and Hebrew Tradition"Author: Thomas Henry HuxleyLanguage: English
- On the Nature of ThingsAuthor: Lucretius Carus, Titus, 95? BCE-50? BCE, William Ellery LeonardLanguage: English
- On the Old Road Vol. 1 (of 2): A Collection of Miscellaneous Essays and Articles on Art and LiteratureAuthor: John RuskinLanguage: English
- On the Old Road, Vol. 2 (of 2): A Collection of Miscellaneous Essays and Articles on Art and LiteratureAuthor: John RuskinLanguage: English
- On the Origin of Species by Means of Natural Selection: or the Preservation of Favoured Races in the Struggle for Life. (2nd edition)Author: Charles DarwinLanguage: English
- On the Origin of Species By Means of Natural Selection: Or, the Preservation of Favoured Races in the Struggle for LifeAuthor: Charles DarwinLanguage: English
- On the Pampas; Or, The Young SettlersAuthor: G. A. (George Alfred) HentyLanguage: English
- On the portraits of English authors on gardeningAuthor: Felton, SamuelLanguage: English
- On the Prospects of Christianity: Bernard Shaw's Preface to Androcles and the LionAuthor: Bernard ShawLanguage: English
- On the Reception of the 'Origin of Species'Author: Thomas Henry HuxleyLanguage: English