This delightful and insightful series of essays on the practice of science was written by one of the great minds of the 19th century, Thomas Henry Huxley, a great friend and defender of Charles Darwin and his theory of evolution by natural selection. Includes Huxley's Autobiography, and essays covering Improving Natural Knowledge; A Liberal Education; On a Piece of Chalk; The Principle Subjects of Education; The Method of Scientific Investigation; On the Physical Basis of Life; and a Postscript: A Review of Huxley's Life and Work. Highly readable and very pertinent in this age of doubt.