& 
LIST OF ILLUSTRATIONS. 
I. PLATES. 
PLATES 
I., II. — Spectra of haemoglobin, its compounds and derivatives (modified from 
Preyer, " Die Blutkrystalle ,; ). 
in. — Sjaectra of various colouring matters (from MacMunn, " Tlie 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. C4uinea-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 hamiatin 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 doe's blood. 
