_Philadelphia._ M. SEMPLE, M.D., Prof. Chem. and Tox. Hom. Med. Col. Pa. I have been requested to give my opinion of "Dr. Hempel's Repertory." It supplies, in my estimation, a desideratum, which entitles its author and publisher to the thanks of the whole Homoeopathic school, and exhibits an amount of labor and research, which few men beside the indefatigable author would have been willing to undertake. I should consider no Homoeopathic Library complete without it. _Philadelphia._ ROBT. T. EVANS, JR. M.D. I have frequently consulted the "Repertory of the Homoeopathic Materia Medica," so ably compiled by Dr. Hempel, and do not hesitate to commend it to the attention of the adherents of Homoeopathy. _New-York._ A. GERALD HULL, M.D. Dr. Hempel's Repertory is an elaborate practical index to the Materia Medica and the only complete work of the kind in our language. _New-York._ J. T. CURTIS, M.D. I have used Hempel's Repertory almost from the first day of its publication, and I am more and more pleased with it, the more I use it. I make frequent reference to it, not only for assistance against the daily exigencies of medical practice, but in the composition of the medical work in which I have been for some time engaged, I am almost always sure to find the very information that I require. I have frequently quoted in my Treatises on Headache, Apoplexy, and Diseases of Females, and shall continue to quote in the forthcoming books. The industry, and command of the English language possessed by Dr. Hempel, are truly wonderful. _New-York._ J. C. PETERS, M.D. =Jahr's= New Manual; originally published under the name of Symptomen Codex. (Digest of Symptoms.) This work is intended to facilitate a comparison of the parallel symptoms of the various Homoeopathic agents, thereby enabling the practitioner to discover the characteristic symptoms of each drug, and to determine with ease and correctness what remedy is most Homoeopathic to the existing group of symptoms. Translated, with important and extensive additions from various sources, by Charles Julius Hempel, M.D., assisted by James M. Quinn, M.D., with revisions and clinical notes by John F. Gray, M.D.; contributions by Dr. A. Gerald Hull, George W. Cook, and Dr. B. F. Joslin, of New-York; and Drs. C. Hering, J. Jeanes, C. Neidhard, W. Williamson, and J. Kitchen of Philadelphia; with a Preface by Constantine Hering, M.D., 2 vols., bound $14.00. The third volume is issued as a separate work, under the title of _Complete Repertory_ of the Homoeopathic Materia Medica. By Charles J. Hempel, M.D. 1224 pages. Price $6, or all three volumes at $20.