- Intermittent fever1
- Introductory lecture on the claims of the materia medica: delivered in the University of Pennsylvania, October 10th, 18591
- Introductory lecture to the course of chemistry: delivered in Jefferson Medical College, November 3, 18411
- Introductory lecture to the course of materia medica: delivered in the University of Pennsylvania, November 6, 18371
- Introductory to the report of the Bureau of Materia Medica: with synopses of the papers presented at the 36th annual session of the American Institute of Homoeopathy1
- Jahr's and Possart's new manual of the homoeopathic materia medica: arranged with reference to well authenticated observations at the sick bed, and accompanied by an alphabetical repertory, to facilitate and secure the selection of a suitable remedy in any given case1
- Jahr's clinical guide, or pocket-repertory for the treatment of acute and chronic diseases1
- Jahr's new manual, or, Symptomen-codex1
- Jahr's new manual, or, Symptomen-codex (Volume 1)1
- Jahr's new manual, or, Symptomen-codex (Volume 2)1
- Jahr's new manual, or, Symptomen-codex (Volume 3)1
- Key to the materia medica, or, Comparative pharmacodynamic1
- La psoralea pentaphylla y su alcaloide: prueba excrita que para el examen general de medicina, cirugia y obstetricia1
- Lac caninum and polygonum hydropiper1
- Laryngology and otology in colonial times1
- Lecture introductory to the course of materia medica and pharmacy: in the University of Pennsylvania, for the session of 1835-61
- Lecture introductory to the course on materia medica and pharmacy, in the University of Pennsylvania1
- Lecture, introductory to the course on materia medica and therapeutics, in the Medical Department of the Iowa State University, session of 1851-21
- Lectures on the materia medica1
- List of 969 homoeopathic remedies: 30,000 low and high potencies1