"Notes on Indigo" is a research book written by the eminent British chemist and indigo breeder John Lord Hayes. In this work, the author examines in detail the process of indigo production - a precious dye used in the textile industry. The book should be read both by specialists in the field of chemistry and textiles, and by the general public, as it reveals interesting facts about the production of this wonderful substance and its impact on society. "Indigo Notes" is an invaluable document for anyone interested in the history of the chemical industry and textile production.