Zweierlei Denken: Ein Beitrag zur Physiologie des Denkens

Address of Hon. Theodore Roosevelt, delivered at Boston, Mass., Saturday, April 27, 1912

Address of President Roosevelt at Cairo, Illinois, October 3, 1907

Address of President Roosevelt at Canton, Ohio, September 30, 1907

Address of President Roosevelt at Chautauqua, New York, August 11, 1905

Address of President Roosevelt at Keokuk, Iowa, October 1, 1907

Address of President Roosevelt at St. Louis, Missouri, October 2, 1907

Address of President Roosevelt at the Lincoln dinner of the Republican club of the city of New York, Waldorf-Astoria Hotel, February 13, 1905

Address of President Roosevelt at the laying of the corner stone of the office building of the House of Representatives, Saturday, April 14, 1906

Address of President Roosevelt on the Occasion of the Laying of the Corner Stone of the Pilgrim Memorial Monument, Provincetown, Massachusetts, August 20, 1907

Address of President Roosevelt on the occasion of the celebration of the hundredth anniversary of the birth of Abraham Lincoln, Hodgenville, Ky., February 12, 1909

Address of the President at the unveiling of the monument to General Sheridan, Wednesday, November 25, 1908