- Jones, I. G. (Ichabod Gibson), 1807-18576
- Keating, Betsy, author6
- Keating, John M. (John Marie), 1852-1893, author6
- Kipp, Charles J. (Charles John), 1838-1911, author6
- Kirkpatrick, Charles M., author6
- Knapp, Frederick Newman, 1821-18896
- Kulmus, Johann Adam, 1689-17456
- Küntscher, Gerhard, author6
- La Roche, R. (René), 1795-18726
- Lambert, T. S. (Thomas Scott), 1819-18976
- Lawson, L. M. (Leonidas Merion), 1812-18646
- Lechat, Henri, 1862- ?, author6
- Leffmann, Henry, 1847-1930 author6
- Lend a Hand Society. Boston Floating Hospital, author.6
- Little, William S., author6
- Lobstein, J. F. Daniel (Johann Friedrich Daniel), 1777-18406
- Lundblad, Jennifer P., author6
- Mason, Lewis D. (Lewis Duncan), 1843- author6
- Massachusetts College of Pharmacy.6
- Massachusetts, enacting jurisdiction.6