124 STUDIES IN ELECTRO-PHYSIOLOGY: 



ANIMAL 



VEGETABLE 



Fig. 56. 



Diagrammatic frontal section of 

 the pregnant human womb. (After 

 Haeckel.) 



Fig. 57. 



Ovule of a gymnosperm in 

 longitudinal section. (After 

 Sachs.) 



Fig. 58. 



Epithelium-cells of Descemet's 

 membrane. (After Smirnow and 

 (Sch&fer.) 



Fig. 59. 



Portion of the peripheral proto- 

 plasm of the embryo-sac of Reseda 

 odorata. (After Strasburger.) 



