""A Companion to Dr. Thornton's Lectures on Botany"" is a book written by Robert John Thornton in 1816. It is a comprehensive guide to the lectures on botany given by Dr. Thornton, who was a renowned botanist of his time. The book covers all the important aspects of botany, including plant anatomy, classification, and reproduction. It also provides in-depth information on the various plant families and their characteristics. The book is divided into...