On Protoplasm is a book written by James Ross in 1874. The book is an examination of the criticism that Dr. James Hutchinson Stirling made of Professor Huxley's views on protoplasm. Ross delves into the scientific debate surrounding protoplasm, the substance that makes up the living matter of all organisms. He discusses the different theories and opinions put forth by Stirling and Huxley, and offers his own insights and analysis on the matter. The...