The book "Treatise on Foreign Teas Extracted from the book of an eminent work, which has recently seen the light, entitled Essay on Nerves" by Hugh Smith, is a study devoted to foreign varieties of tea. The author offers the reader his generalized view on the subject of tea, analyzing its effects on the body and nervous system. In this book, Hugh Smith examines the various types of foreign teas, their history, cultivation and health effects. He reveals the secrets of making tea and talks about its beneficial properties. The author also draws attention to the effect of tea on the human nervous system, revealing its properties as a sedative or tonic. "Treatise on Foreign Teas Extracted from the book of an outstanding work that has recently seen the light, entitled Essay on Nerves" is an interesting and useful book for everyone who is interested in the world of tea and its effect on the human body. The author invites readers to get to know this drink more deeply and to reveal its secrets.