Produced by Jens Nordmann and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive/Canadian Libraries) Transcriber's Notes: The original spelling and minor inconsistencies in the spelling and formatting have been maintained. The ligature oe has been marked as [oe]. Text in italics has been marked with underscores (_text_). EMBRYOLOGY THE BEGINNINGS OF LIFE BY GERALD LEIGHTON, M.D., F.R.S.E. AUTHOR OF "THE GREATEST LIFE," "BRITISH SERPENTS" "HUXLEY: HIS LIFE AND WORK," ETC. LONDON: T. C. & E. C. JACK 67 LONG ACRE, W.C., AND EDINBURGH NEW YORK: DODGE PUBLISHING CO. * * * * * CONTENTS CHAP. PAGE I. THE CELL AND THE INDIVIDUAL 7 II. PROBLEMS OF REPRODUCTION 15 III. PROBLEMS OF REPRODUCTION (_continued_) 23 IV. THE MAKING OF A MAN 36 V. FERTILISATION AND EARLY DEVELOPMENT 47 VI. EARLY DEVELOPMENT 53 VII. THE BEGINNINGS OF THINGS 59 VIII. THE BEGINNINGS OF THINGS (_continued_) 62 IX. THE BEGINNINGS OF THINGS (_continued_) 66 X. THE BEGINNINGS OF THINGS (_continued_) 73 XI. HOW THE EMBRYO IS NOURISHED 78 XII. RECAPITULATION 84 BIBLIOGRAPHY 90 INDEX 91 * * * * * EMBRYOLOGY CHAPTER I THE CELL AND THE INDIVIDUAL What is Embryology, and what is its significance or interest to the ordinary educated man and woman? The answer to the question is the justification for the appearance of the following pages, and one may regard it as a somewhat striking fact, that in the production of a series of works of which this volume is one, those responsible for the subjects should have deemed it advisable to include Embryology.