- Lectures on the diseases of infancy and childhood1
- Lectures on the principles and methods of medical observation and research: for the use of advanced students and junior practitioners1
- Lectures on the principles and practice of physic: delivered at King's College, London3
- Lectures on uterine displacements1
- Legal prohibition the only remedy for drunkenness: being the substance of two discourses, delivered in the Chestnut Street Church, Louisville, on the first Sabbaths of April and July, 19551
- Lesions of the epiglotitc cartilage1
- Lesser writings1
- Letter accompanying a report from Dr. Sutherland on epidemic cholera in the metropolis in 18541
- Letter addressed to the mayor and aldermen of the city of Knoxville1
- Letter from Featherstone Lake Osler to the Bishop of Toronto [Transcript]1
- Letter to Prof. R.D. Mussey1
- Letter to Valentine Mott, M.D: in reply to his valedictory address to the members of the New-York Academy of Medicine1
- Letter to Worthington Hooker, M.D., of Norwich, in relation to so much of his book, entitled, "Physician and Patient", as has reference to homoeopathy1
- Letter to ladies, in favor of female physicians for their own sex2
- Letter to the Rev. John Bachman, D.D., on the question of hybridity in animals: considered in reference to the unity of the human species1
- Letter to the homoeopathic physicians of the United States: presented to the American Institute of Homoeopathy1
- Letter to the members of the Connecticut Medical Society1
- Letter to the right worshipful the mayor of Newcastle-on-Tyne (N.G. Lambert) on the outbreak of cholera in Newcastle1
- Letters of Cenci, written four years ago, on the sanitary reforms needed in New Orleans, and re-published by order of the City Council1
- Letters on syphilis: addressed to the chief editor of l'Union meĢdicale1