Pythagoras: the birth of mathematical science.--Aristotle: his science and his system.--The Alexandrian period: Archimedes and Ptolemy.--Copernicus and the revival of science.--Galileo: the new science clashes with theology.--Harvey and the circulation of the blood.--Isaac Newton: science comes of age.--Lavoisier: the father of scientific chemistry.--Dalton and the atomic theory.--Faraday and Maxwell: The science of electro-magnetism.--Helmholtz and the conservation of energy.--Lamarck and Darwin: the doctrine of evolution.--Pasteur: the germ theory of disease.--Mendel and the science of heredity.--Einstein and the theories of relativity.--The atom and the quantum theory.--Conclusion.--Bibliographical notes (p. 462-472)