15 
unaltered condition, it is probable that the carrier itself has suffered 
complete and final oxidation hi greater or less amount and that the 
resulting oxide or oxidation product can no longer combine with the 
hydrogen peroxide, in which case we would have — 
25.H2O2 + C20H16O4 = B-(y + 3H2O + C20H14O4. 
SUBSTANCES OTHER THAN BLOOD WHICH REACT WITH GUAIA- 
CUM OR WITH OTHER CHROMOGENIC SUBSTANCES EMPLOYED 
IN '.HEMATOLOGIC INVESTIGATIONS, EITHER ALONE OR WITH 
HYDROGEN PEROXIDE. 
The chief objection which has been urged against the guaiacum 
test for blood and all tests of a similar character is that these reac- 
tions are given by a large number of substances other than blood. 
Various observers working m this field have found the following sub- 
stances to give the guaiacum or similar reactions (the numbers refer 
to the bibliography at the end of this article) : 
All oxidizing agents, 10. 
The halogens, 170. 
Chlorine, 10, 24, 37, 124, 139, 147, 184. 
Bromine, 37, 124, 139, 147, 184. 
Iodine, 90, 124, 147, 184. 
Ozone, 24, 90, 139, 146, 147, 170. 
Ozonized air, 25, 146. 
Hydrogen peroxide, 76, 170, 184. 
Ammonia, 37. 
Finely diwded metals, especially the noble metals, 170. 
Copper, 164. 
Iron, 164. 
Platinum black, 10, 141, 146, 147, 149, 164, 184. 
Steel, 203. 
Compounds of certain hea^y metals: 
Cobalt salts, 128. 
Cobalt chloride, 137, 169. 
Chromium salts. 111, 170. 
Chromic acid, 24, 137, 139, 161. 
Potassium chromate, 24, 73, 147. 
Copper sulfate and other copper compounds, 3, 7, 50, 73, 129, 137, 139, 147, 165, 
170, 171, 197, 203. 
Copper nitroprusside, 137. 
Fehling’s solution, 10, 161. 
Gold salts, 203. 
Gold chloride, 137. 
Iron salts, 2, 21, 37, 76, III, 128, 139, 165, 169, 170, 171, 184, 193, 197, 201, 203. 
Ferrous sulfate, 4, 155, 165. 
Ferrous sulfide, 165. 
Ferrous chloride, 147, 165. 
Feme chloride, 10, 24, 76, 105, 156, 161, 165. 
Ferric citrate, 105. 
Ferric hydroxide, 73. 
Ferric lactate, 165. 
