aoe CHIKANOSUKE OGAWA 
; 
; 
; 
; 
| 
Vig. 12 Respiratory epithelium. Cat. Silver impregnation. X 350. 
Fig. 13 Respiratory epithelium. Rabbit embryo (11 em.). Silver impregnation, with nuclear 
staining. XX 350. 
Fig. 14 Respiratory epithelium. Rabbit embryo (11 em.). Hematoxylin-eosin. xX 600 (not 
from the injected material, but from the material soaked in fixing solution). 
Vig. 15 Respiratory epithelium. Rabbit embryo of full term. Hematoxylin-eosin. XX 1700. — 
