PLATE VIII 



Fig.6. 



FIG. i. LUNG OF FROG, MAGNIFIED, SHOWING CAPILLARIES. From MALPIGHI. 

 FIG. 2. CAPILLARY NETWORK IN TAIL OF EEL. FVom LEEUWENHOEK. 



A, C, E are Veins, and B, D, F are Arteries. 



FIG. 3. RED BLOOD CORPUSCLES OF SALMON. From LEEUWENHOEK. 

 FIGS. 4 AND 5. HUMAN RED BLOOD CORPUSCLES. From LEEUWENHOEK. 

 FIG. 6. HUMAN RED BLOOD CORPUSCLES DRAWN FROM THE OBJECT UNDER 



A MODERN MICROSCOPE. 



