CONTENTS xi 



(Jc) Fibrous Protoplasm .... 



(f) Theories concerning the Causes of Radiate Appearances 



6. The Homogeneous Protoplasm and the Alveolar Theory 



7. The Phenoinena of Protoplasmic Movement in their 



^ Relation to the Alveolar Structure . 

 [a] Theories as to the Causes of the Phenomena of Movement 

 (6) So-called Contractility .... 

 (c) Contractility of the alleged Reticular Framework 

 (,d) Objections to the Theory of Contractility 

 (e) Hypotheses of Hofmeister, Sachs, and Engelmann 

 (/) Electrical Hypotheses of Velten and Fol . 



(g) Leydig's View of the so-called Hyaloplasm 



(h) Montgomery's Hypothesis ... 



- (i) Hypotheses relating to Surface Tension — Berthold, 

 Quincke . . . . . 



{j) My own View of the Explanation of Amoeboid Move^ 

 ment ..... 



On the Currents in the Water surrounding Amcebse, 

 etc. ...... 



ijc) Independent Movements of Granules 

 (Z) Causes of Internal Displacements in the Alveolar ProtO' 

 plasm ..... 



(m) Possibility of an Explanation of Muscular Contraction in 

 this Way ..... 



~ (m) Rotational Currents in Plant Cells 

 Literature ....... 



Explanation of the Plates ... 



Index .... ... 



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