Samuel Frederick Gray’s “A Supplement to the Pharmacopoeia,” published in 1821, stands as a significant work in the field of pharmacology. This comprehensive treatise extends beyond the confines of the official London Pharmacopoeia, encompassing a wide array of substances utilized not only by medical practitioners but also by chemists, druggists, and herbalists for various purposes. Gray’s meticulous compilation includes detailed descriptions of drugs and compounds, both commonly used and obscure, providing invaluable insights into the medicinal practices of the early 19th century.

The book is notable for its inclusion of a vast collection of medical formulae, offering practitioners a practical guide to the preparation and application of various remedies. Furthermore, Gray provides an explanation of the contractions used by physicians and druggists, facilitating a clearer understanding of medical prescriptions and communications. The work also presents a medical arrangement of the articles from the London Pharmacopoeia, complete with their respective doses, allowing for quick reference and application in clinical settings.

In addition to its focus on established medical substances, Gray’s supplement delves into the realm of indigenous plants of the British Isles, highlighting those capable of being used in medicine. This aspect of the work underscores a growing interest in the potential of local flora in therapeutic contexts, reflecting a broader movement towards the exploration of natural remedies. The inclusion of a comprehensive index, listing various names by which the articles have been known at different periods in both English and Latin, further enhances the utility of the book as a reference tool for practitioners and scholars alike.

Gray’s dedication to compiling such an extensive and detailed supplement demonstrates a commitment to advancing the field of pharmacology and supporting the medical community. By bridging the gap between traditional practices and emerging scientific knowledge, “A Supplement to the Pharmacopoeia” serves as a testament to the evolving nature of medical science during the period. Its enduring relevance is evidenced by its continued availability and study, offering contemporary readers a window into the historical foundations of pharmacological practice.