INDEX TO THE PLATE OF ABSORPTION SPECTRA. 



No. 1. Oxyhsemoglobin. 



No. 2. Haemoglobin. 



No. 3. Methsemoglobin (in neutral, or faintly alkaline, solution). 



No. 4. Hsematin in acid alcohol solution. 



No. 5. Reduced hsematin in alkaline solution. 



No. 6. Hsematoporphyrin in acid solution. 



No. 7. Urobilin. 



