PLATE XXXII 



Fig. I. — Oxyhemoglobin, ox blood. 



Fig. 2. — Oxyhemoglobin, ox blood. 



Fig. 3. — NO-hemoglobin , ox blood. 



Fig. 4. — Methemoglobin, ox blood. Prepared by treating oxyhemoglobin with 

 potassium ferricyanid. 



Fig. 5. — Methemoglobin. ox blood. Prepared by treating oxyhemoglobin with 

 potassium ferricyanid. 



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