xiv PROTOPLASM 



FIG. PAGE 



11. Diagram of a drop of oil containing particles of lamp-black in sus- 



pension, showing the position assumed by the lamp-black under 



the action of extension-currents . . . . .69 



12. Diagram showing the extension-currents produced in a drop of oil 



when approached by a bent platinum wire, heated by means of an 

 electric current . . . . . . .72 



13. Diagram showing the extension -currents produced in a drop of oil 



in contact with a capillary tube containing soap solution . . 73 



14. Diagram showing a method of obtaining circulatory extension- 



currents in a drop of paraffin oil . . . . .74 



15. The same as Fig. 5 . . . . . . .76 



16. Diagram of a section through a drop of oil under the cover-slip when 



free from pressure (A) and when compressed (B) . . . 78 



17. Sketch of two streaming drops of oil-foam in closed cells . . 80 



18. Diagram representing the true reticulum (a) with an exact focus, 



and the false optical reticulum (&) with a higher focus . .215 



19. Diagram of the currents set up in a drop of water on a slide, when 



approached by ether on one side. To show the currents ivory 

 black has been mixed with the water .... 301 



20. Diagram of a median longitudinal section through the drop shown 



in Fig. 19 . . . . . . . .302 



21. Diagram to show the currents in the growing pseudopodium of an 



Amceba . . . . . . . .311 



22. Diagram of muscle contraction ..... 325 



23. Diagram of rotational streaming in plant cells . . . 328 



