Volume 38 of The Harvard Classics. A collection of scientific papers including On the Motion of the Heat and Blood in Animals by Harvey, Three Original Publications on Vaccination by Jenner, The Contagiousness of Puerperal Fever by Holms, On the Antiseptic Principle by Lister, The Physiological Theorgy of Fermentation and The Germ Theory by Pasteur, Prejudices Which Have Retarded the Progress of Geology and Uniformity in the Series of Past Changes in the Animate and Inanimate World by Lyell.