18 
Various miscellaneous substances: 
Certain medicinal preparations, 201. 
Certain phosphorizing substances, 25. 
Flannel, 73, 203. 
Ink stains, 45, 184. 
Leather, 10, 203. 
Tanned sheep leather, 45, 73, 184. 
Papers : 
Certain kinds of, 25. 
Filter papers, 203. 
Glazed papers containing alum, 76. 
Soap, 37. 
SUBSTANCES WHICH DO NOT REACT WITH GUAIACUM OR WITH 
THE OTHER CHROMOGENIC SUBSTANCES EMPLOYED IN HEMA- 
TOLOGIC INVESTIGATIONS EITHER ALONE OR WITH HYDRO- 
GEN PEROXIDE. 
In the course of these investigations a number of substances have 
been found by various observers which do not show the guaiacum or 
similar reactions. These are as follows (the numbers refer to the 
bibliography at the end of this article) : 
Metallic compounds: 
Alumina, old and fresh, 73. 
Bismuth salts, 73. 
Chromium chloride, 73. 
Cobalt salts, 73. 
Cuprous chloride, 73. 
Iron — 
Bog iron, 73. 
Ferrous oxide, 73. 
Ferric hydroxide, heated, 73. 
Hematite, 73. 
Rust, 7, 73, 110, 184. 
Traces of iron, 192. 
Lead salts, 73. 
Manganese sulfate and carbonate, 73. 
Mercuric chloride and nitrate, 73. 
ATckel salts, 73. 
Palladium chloride, 73. 
Platinum chloride, 73. 
Zinc chloride, 73. 
Substances of animal origin: 
Albumin, 25, 73, 105. 
Bile, 73, 105. 
Coloring matter of bile, 203. 
Bilirubin, 29, 165. 
Blood serum, 73, 105, 165. 
Cochineal, 59, 73, 184. 
Clear exudate of ascites, 165. 
Fibrin, 73, 184. 
Gelatin, 25. 
Hematoidin, 29. 
