CONTENTS OF THE FIRST VOLUME 



THE PROGRAMME 



PAGE 



On Lord Giftord's Conception of " Science " . 1 



Natural Sciences and " Natural Theology " . . .3 

 Our Philosophical Basis ....... 5 



On Certain Characteristics of Biology as a Science . 9 



The Three Different Types of Knowledge about Nature . 13 



General Plan of these Lectures . . . . . .15 



General Character of the Organic Form . . . . .19 



SECTION A. THE CHIEF RESULTS OF ANALYTICAL 



BIOLOGY 



PART I. THE INDIVIDUAL ORGANISM WITH REGARD 

 TO FORM AND METABOLISM 



A. ELEMENTARY MORPHOGENESIS- 



Evolutio and Epigenesis in the old Sense . ^~> 



The Cell 27 



The Egg : its Maturation and Fertilisation . 31 



The First Developmental Processes of Echinus 



Comparative Embryology .... 



The First Steps of Analytical Morphogenesis . 45 



The Limits of Pure Description in Science . . 50 



. EXPERIMENTAL AND THEORETICAL MORPHOGENESIS- 



1. THE FOUNDATIONS OF THE PHYSIOLOGY OF DEVELOPMENT. 



"EVOLUTIO" AND " EPIGENESIS " . 52 



The Theory of Weismann ... 52 



Experimental Morphology . . 56 



ix 



