TABLE OF CONTENTS 

 Foreword v 



W. E. Loomis, Iowa State College 



Introduction 1 



William Seifriz, University of Pennsylvania 



Microscopic Structure of the Cell Wall 11 



Charles W. Hock, Textile Research Foundation, Bureau of Standards 



Proteins and Protoplasmic Structure 23 



Laurence S. Moyer, University oj Minnesota 



Molecular Structure in Protoplasm 41 



O. L. Sponsler and Jean D. Bath, University of California 



Some Mechanical Properties of Sols and Gels and Their Re- 

 lation TO Protoplasmic Structure 85 



Herbert Freundlich, University of Minnesota 



Structural Differentiation of Cytoplasm 99 



G. W. Scarth, McGUl University 



Structural Differentiation of the Nucleus 109 



C. L. Htiskins, McGill University 



Protoplasmic Streaming in Relation to Gel Structure in the 



Cytoplasm 12' 



Douglas A. Marslayid, New York University 



The Relation of the Viscosity Changes of Protoplasm to 



Ameboid Locomotion and Cell Division 163 



Warren H. Lewis, Wistar Institute 



Physical Aspects of Protoplasmic Streaming 199 



Nobnrd Kamiyc, University of Tokio 



Some Physical Properties of Protoplasm and Their Bearing 



on Structure 245 



William Seifriz, University of Pennsylvania 



Supplement: 



Protein and Protoplasmic Structure, Communication 



jroyn Kurt H. Meyer, University of Geneva 267 



Letter From W. T. Astbitry, University of Leeds .... 270 

 Index 273 



library) 30| ^7:1707- 



[S^V ^^^^ J^i 



