CONTENTS xvii 



PAGE 



On the occurrence of Vacua in the Organic, or Metabolic, 

 Work of the Human Body, and on " Suction " 

 Evacuation, and Gravitation, in relation thereto, or 

 the Dynamics of Circulation - 182 



Secretion, and Excretion so called Secretion- - 191 



Excretion - - 198 



Glandular Structures, or Adenography generally - 2OI 



The Phenomena of "Skin Marking" and Skin Exfolia- 

 tion, Epidermic " Shedding," or Solid Excretion - 205 



On the Stages of Evolution of the Human Organism, 

 divided into Uni-cellular, Blasto-dermic, or Multi- 

 cellular, Neur-enteric, and Viscero-Skeletal - 214 



The Developmental Evolution of the Human Organism - 229 

 On the Notochord, as a Skeletal Evolutionary Factor - 242 

 Ossification, and the Skeleton - 255 



Lignification in Plants as compared with Ossification in 



the Human Organism - 261 



Embryonic Differentiation, or Division and Reunion, of 

 the Neur-enteric Canal, with some account of the 

 Alimentary Canal and the process of Digestion - 263 



The Sigmoid Flexure of the Colon - 278 



On the Neuroglia, and how, and when, the Elements of 



the Ingesta become alive - 283 



On the Cell, in its general bearings on the Evolution of 



Living Forms - 299 



The Cell, in some of its Intrinsic, Individual, and 

 Communal, aspects, and in the Genesis of the 

 Nervous System - - 305 



The growth of the Systemic Nerve Cell, and what 



follows. With Neuro-Psychic Genesis - - 3 1 1 



