This book is primarily a scientific investigation into the chemical makeup of Piper methysticum, commonly known as kava or ava. Francis B. Power, a chemist, meticulously documents his experiments and findings regarding the extraction and identification of the plant's active compounds. The work is divided into detailed sections describing the methods used to isolate and analyze the plant's constituents, including resins, acids, and other chemical compounds. The book aims to provide a comprehensive understanding of the chemical basis for kava's physiological effects, which were of significant interest in the late 19th century.