Transcriber’s notes: The text of this e-book has been preserved as in the original, including inconsistent capitalisation and hyphenation. Archaic and inconsistent spellings have also been preserved except where obviously misspelled in the original. To assist readers, an additional item (‘Editor’s Introduction’) has been added to the table of contents. Footnotes are positioned below the relevant paragraph. Spelling inconsistencies include (but are not limited to) the following: Fifty/Fiftie enjoy/enioye natural/naturall physitians/physicians book/booke aëreal/aereal/aërial Corrected misspellings include the following: preceive → perceive under-their → understand their retrogade → retrograde aditional → additional aud → and so → to Valkveld → Vlackveld slugglishly → sluggishly EVERYMAN’S LIBRARY EDITED BY ERNEST RHYS SCIENCE THE CIRCULATION OF THE BLOOD WITH AN INTRODUCTION BY E. A. PARKYN THE PUBLISHERS OF _EVERYMAN’S LIBRARY_ WILL BE PLEASED TO SEND FREELY TO ALL APPLICANTS A LIST OF THE PUBLISHED AND PROJECTED VOLUMES TO BE COMPRISED UNDER THE FOLLOWING TWELVE HEADINGS: TRAVEL SCIENCE FICTION THEOLOGY & PHILOSOPHY HISTORY CLASSICAL FOR YOUNG PEOPLE ESSAYS ORATORY POETRY & DRAMA BIOGRAPHY ROMANCE [Illustration] IN TWO STYLES OF BINDING, CLOTH, FLAT BACK, COLOURED TOP, AND LEATHER, ROUND CORNERS, GILT TOP LONDON: J. M. DENT & CO. NEW YORK: E. P. DUTTON & CO. [Illustration: HOC SOLUM SCIO QUOD NIHIL SCIO ] [Illustration: An Anatomical Disquisition on The MOTION of the HEART & BLOOD in ANIMALS BY WILLIAM HARVEY Translated from the Latin by ROBERT WILLIS London: J·M·Dent & Co. New York: E·P. Dutton & Co. ] PRINTED BY HAZELL, WATSON AND VINEY, LD., LONDON AND AYLESBURY EDITOR’S INTRODUCTION