Pharmacologia; or, The History of Medicinal Substances By J. A. Paris, M.D. - Third American Edition - Published in New York, 1825

A scarce early 19th-century American medical text, bound in full leather, featuring a remarkable hand-colored “Medicinal Dynameter” dial—a rotating pharmacological reference tool used to compare the strength and dosage of medicinal compounds.

This interactive chart, mounted within the front of the volume, visually represents relationships between substances such as opium, arsenic, camphor, and other early pharmaceutical preparations—offering a rare glimpse into pre-modern drug standardization and medical theory.