CHAPTER XXXIX

Charles Darwin and the Development of Science

Scientific Activity of the Nineteenth Century--Wallace's "Wonderful Century"--Useful and Scientific Steps of Progress--Foster's Views of Recent Progress--Discoveries in Astronomy--The Spectroscope--The Advance of Chemistry--Light and its Phenomena--Heat as a Mode of Motion--Applications of Electricity--The Principles of Magnetism--Progress in Geology--The Nebular and Meteoric Hypotheses--Biological Sciences--Discoveries in Physiology--Pasteur and His Discoveries--Koch and the Comma Bacillus--The Science of Hygiene--Darwin and Natural Selection 569