The “Descriptive Catalogue of Essential Oils and Organic Chemical Preparations” by Frederick Belding Power is a comprehensive reference work published in 1894, detailing the chemical and physical properties of various essential oils and organic compounds. The catalogue serves as a scientific resource for chemists, pharmacists, and perfumers, offering insights into the composition, uses, and standards of purity for these substances.​

Power’s work emphasizes the importance of purity and standardization in the production of essential oils. He highlights that many oils, such as those derived from citrus fruits, cassia, and Indian grass, were traditionally produced in their native regions and often suffered from adulteration. Through experimental distillation and analysis in their Leipzig laboratory, the authors aimed to establish the chemical and physical characteristics of pure products, thereby improving quality and uniformity in the industry .​

The catalogue includes detailed descriptions of numerous essential oils, providing information on their extraction methods, chemical compositions, and potential applications. This resource was invaluable at the time for advancing the understanding of essential oils and their role in various industries, including medicine, cosmetics, and perfumery.​

Power’s catalogue stands as a testament to the scientific approach to the study and application of essential oils in the late 19th century. It reflects the era’s commitment to enhancing product quality and consistency through rigorous scientific investigation.