268 RALPH S. LILLIE AND EARL N. JOHNSTON. 



DDSCRIPTION OF PLATE IV.' 



FIG. 16. Co-ferricyanide structures formed in 2 per cent, egg albumin + 4 per 

 cent. KsFeCye + i per cent. NaCl. A group of surface saccules shows at one side. 



FIG. 17. Co-ferricyanide filaments and striated shell-like structures at the 

 surface of the metal. The tortuous filaments are submerged in the solution. 



FIG. 1 8. Cd-ferricyanide structures. The longest of these structures are about 

 320 microns. It required about 2 hrs., for these to form. 



FIG. 19. Cd-ferricyanide structures photographed after 24 hours in the solution 

 The largest are i.i mm. long. 



FIG. 20. Cu-ferricyanide structures. Formed in a 4 per cent, solution of 

 KsFeCye in distilled water + 4 per cent. NaCl. 



FIG. 21. Ni-ferricyanide precipitation filaments. Formed in a 2 per cent, egg 

 albumin solution + 4 per cent. KsFeCye + i per cent. NaCl. 



