- Ingals, E. Fletcher (Ephraim Fletcher), 1848-1918, author2
- Ingersoll, A. J. (Andrew J.) author1
- Ingersoll, A. J. (Andrew J.), author2
- Ingersoll, Lurton Dunham.1
- Ingham, Samuel D. (Samuel Delucenna), 1779-1860, author1
- Inglis, David, 1850-1922 author2
- Inglis, David, 1850-1922, author1
- Ingraham, Charles Wilson, author1
- Ingram, Dale, 1710-17931
- Innes, John, 1739-17772
- Inspectors of the Philadelphia County Prison.2
- Instituto Homeopático do Brasil.1
- Instituto Médico Nacional (Mexico), author.1
- Inter-National Drug Company, author.1
- International Conference on Health Problems in Tropical America (1924 : Kingston, Jamaica) author.1
- International Congress of Charities, Correction, and Philanthropy (1893 : Chicago, Ill.) author.5
- International Congress of Ophthalmology 1876 : New York, N.Y.)1
- International Hahnemannian Association, author.1
- International Medical Congress (1876 : Philadelphia, Pa.)1
- International Medical Congress (1876 : Philadelphia, Pa.), author.1