BLOOD. 



.87 



FIG. 52. 



OXYH^EMOGLOBIN CRYSTALS FROM BLOOD OF THE HORSE. 



Reproduced from a micro-photograph furnished by Prof. E. T. Reichert, of the 

 University of Pennsylvania. 



FIG. 53- 



OXYH^MOGLOBIN CRYSTALS FROM BLOOD OF THE SQUIRREL. 



Reproduced from a micro-photograph furnished by Prof. E. T. Reichert, of the 

 University of Pennsylvania. 



