- Observations on Mr. Foden's mineral substitute1
- Observations on a change of climate in pulmonary consumption: read before the Columbian Institute in 1826, and published in the Medical and surgical journal : with additional remarks on the Red Sulphur Springs of Virginia1
- Observations on a letter from Dr. N. Chapman, of Philadelphia to Dr. W.B. Tyler, of Frederick (MD.) on the subject of cholera: as appearing in Philadelphia, August, 18321
- Observations on a portion of the Atlantic tertiary region: with a description of new species of organic remains1
- Observations on abortion, with an account of the means, both medicinal and mechanical, employed to produce that effect, together with advice to females1
- Observations on abortion: containing an account of the manner in which it takes place, the causes which produce it, and the method of preventing or treating it2
- Observations on apparent death, from suffocation, by hanging or drowning: choke damp, produced by inhaling carbonic acid, or some other irrespirable exhalation, by a stroke of lightning or electricity, and by exposure to extreme cold : with directions for using the resuscitating apparatus, invented by the author, and general instructions for the recovery of persons from suspended animation1
- Observations on certain parts of the animal oeconomy: inclusive of several papers from the Philosophical transactions, etc2
- Observations on cholera as it appeared at Port Glasgow during the months of July and August, 1831: illustrated by numerous cases1
- Observations on combustion & acidification: with a new theory of those processes, founded on the conjunction of the phlogistic and antiphlogistic doctrines1
- Observations on croup or hives: addressed in a letter to A. R. Delile1
- Observations on delirium tremens1
- Observations on diseases incident to seamen: whether employed on, or retired from actual service, for accidents, infirmities or old age1
- Observations on diseases incident to seamen: whether employed on, or retired from actual service, for accidents, infirmities or old age (Volume 1)1
- Observations on diseases incident to seamen: whether employed on, or retired from actual service, for accidents, infirmities or old age (Volume 2)1
- Observations on diseases incident to seamen: whether employed on, or retired from actual service, for accidents, infirmities or old age (Volume 3)1
- Observations on diseases incident to seamen: whether employed on, or retired from actual service, for accidents, infirmities or old age (Volume 4)1
- Observations on ergot1
- Observations on ergot, read before the Medical Society of the State of New York, February 3, 18411
- Observations on febrile contagion: and on the means of improving the medical police of the city of New-York : delivered as an introductory discourse, in the hall of the College of Physicians and Surgeons, on the sixth of November, 18201