- Observations on the size of the brain in various races and families of man1
- Observations on the spread of Asiatic cholera: and its communicable nature1
- Observations on the subject of cholera: adapted for the general reader1
- Obstetric tables: comprising graphic illustrations, with descriptions and practical remarks : exhibiting on dissected plates many important subjects in midwifery1
- Obstetrics: the science and the art1
- Of the medical and prophylactic treatment of stone and gravel: with a memoir on the calculi of cystine1
- Of the medical profession, and of its preparation: an introductory lecture, read before the medical class of Harvard University, November 5, 18451
- Office of Daniel Brainard1
- Old wine in new bottles, or, Spare hours of a student in Paris1
- On a new genus and species of fossil Ruminantia, Poebrotherium wilsoni1
- On certain laws of cohesive attraction1
- On certain medical delusions: an introductory lecture to the course of institutes of medicine in Jefferson Medical College of Philadelphia : delivered November 4, 18421
- On cholera1
- On cyanosis, or Morbus Caeruleus1
- On diseases of the skin1
- On disorders of the cerebral circulation: and on the connection between affections of the brain and diseases of the heart1
- On ecclecticism in medicine: or a critical review of the leading medical doctrines : an inaugural thesis, presented at the New-York University on the first of March 18451
- On epidemic cholera1
- On etherization in childbirth1
- On etherization: a paper read before the Medical Society of Louisville, December 18, 18481