Philadelphia: J. Dobson, 1842. First American Edition. First printing. Octavo in fours (24cm). In original tan paper-covered boards, backed in brown cloth, with title in gold on black paper spine label; plain endpapers; xxii, -306pp; square and sound, with gentle moderate wear to boards, spine sunned and gently rubbed, spine label rubbed and chipped; endleaves browned, slight dampstaining to extreme outer edges of margins, not affecting text, foxed throughout: Good. A guide to obtaining ingredients and preparing and administering homeopathic medicines, with a preface by the translator defending homeopathy against skepticism. Jahr (1800-75) was the assistant of Samuel Hahnemann, the creator of homeopathy. CORDASCO AA270.