50 
the following table is given the composition of the stains submitted 
by Mr. Elvove, together with the results of my examination: 
No. of 
stain. 
Composition of stain, furnished by Elvove. 
Pound by Kastle. 
1 
2 
3 
4 
5 
6 
10 
11 
12 
13 
14 
15 
16 
-U7 
IS 
19 
20 
21 
22 
23 
24 
23 
Aniline red and jeweler’s rouge a . . . 
Benzopurpurin 
Rabbit blood 
Burnt sienna 
Cochineal and jeweler’s rouge 
C upric f errocy anide 
Cupric oxide 
Cuprous oxide 
Mercuric iodide and jeweler’s rouge 
Mercuric oxide and jeweler's rouge. 
Brick red ink (Higgins) 
Human blood 
Indian red 
Jeweler’s rouge 
Manganous manganite 
Manganese dioxide 
Mouse blood 
Red paint 
Litharge and jeweler’s rouge 
Lead peroxide and jeweler’s rouge. , 
Potassium permanganate 
Red ink 
Silver chromate 
Silver oxide and jeweler’s rouge 
Vermillion 
Artificial coloring matter. 
Do. 
Blood. 
Artificial coloring matter. 
Artificial coloring matter. 
Blood. 
Blood. 
Artificial coloring matter. 
Artificial coloring matter. 
a Wherever jeweler's rouge was used with another substance, approximately equal volumes of the two 
substances were mixed together and a sample of the mixture taken. 
The results of these tests are sufhcient to give an idea of the 
practical utility of the phenolphthalin tests for blood. By no other 
method, unless it may possibly be the spectroscopic or precipitin 
tests, could these stains have been examined in the time actually 
consumed in making these tests with phenolphthalin. A further 
point of interest in connection with the general utility of phenolph- 
thalin as a reagent for blood is that a number of vigorous oxidizimg 
agents and powerful oxygen-carriers entered into the composition of 
the stains prepared by Mr. Elvove, and yet no difficulty was ex- 
perienced in determining which of these contained blood, despite the 
fact that in most cases the original colors of the various stains 
matched so closely that only the most expert examination could 
detect any differences in their color and general appearance. 
