News Wires, White Papers, and Books
- The Technology of Machinery
- The Technology of Military Machines
- The Trans-Mississippi Fur Trade
- The Trans-Saharan Caravan Trade
- The Transformation of Communication in Early America
- The Transformation of Indian Exchange: The Fur Trade
- The Transformation of Native American Warfare: Conflict and the Emergence of Confederations
- The Transformation of Native American Warfare: Trade and the Shift to Economically Motivated Conflict
- The Transformation of Post-Columbian Europe: The Impact of Contact
- The Transit of Venus
- The Turn to Modernism: Art and Architecture
- The Turn to Modernism: Literature and Music
- The Tyrants
- The United States Sanitary Commission
- The Unmoved Mover and Aristotle: Cosmology
- The Urban Economy
- The Vatican Council of 1869–1870
- The Vikings and Magyars
- The Vikings as Explorers and Colonists
- The Waiilatpu Mission and the Whitmans