The book explores the controversial topic of whether or not plants and other forms of vegetation possess the ability to feel sensation. Tupper presents arguments for and against the idea, drawing on scientific research and philosophical theories. He also discusses related topics such as instinct, sensation, and irritability in both plants and animals. The book is written in a scholarly style and is aimed at readers with an interest in botany, philosophy, and the natural sciences. Overall, ""An Essay On The Probability Of Sensation In Vegetables"" is a thought-provoking exploration of a topic that continues to be debated by scientists and philosophers today.