LIST OF ILLUSTRATIONS. 



I. PLATES. 



PLATES 



I., ii. Spectra of haemoglobin, its compounds and derivatives (modified from 



Preyer, " Die Blutkrystalle "). 



in. Spectra of various colouring matters (from MacMunn, " The Spectroscope 

 in Medicine "). 



1. Solar spectrum, with Frauenhofer's lines and millimetre scale. 



2. Fresh human bile. 



3. Alcoholic extract of human bile. 



4. Diluted solution of human bile treated with hydrochloric acid. 



5. Bile treated with nitric acid, and the precipitate dissolved in boiling 



absolute alcohol. 



6. Pig's bile. 



7. Ox or sheep bile. 



8. Ox or sheep bile treated with nitric acid, and the precipitate dissolved 



in boiling alcohol. 



9. Ox bile treated with hydrochloric acid, and the precipitate dissolved in 



boiling alcohol. 



10. Guinea-pig's bile. 



11. Rabbit's bile. 



12. Mouse's bile. 



13. Crow's bile. 



14. Pettenkofer's test on human bile salts. 



15. pig's bile salts. 



16. Band of urobilin in normal human urine. 



17. Bands in urine of rheumatic fever ; the urine treated with nitric acid. 



18. ,, with albuminuria ; the urine treated with nitric acid. 



19. Urine of same case treated with caustic potash. 



20. Bands of hsematin from ovarian cyst. 



21. The same treated with a reducing agent. 



22. Spectrum of 02, after twenty-four hours. 



23. ,, lutein, from peritoneal fluid. 



24. ,, from serum of dog's blood. 



