456 
ORIGINAL ARTICLES. 
“ The ‘ black seam ’ between the chalk and gravel (No. 1) was the only specimen, 
the quantity of which allowed of a separate qualitative examination. It contained 
the following constituents : Water, Silica, Iron, Alumina, Manganese, and Lime, 
with traces of Potash and Phosphoric Acid and Carbonic Acid in the following 
proportions :— 
Insoluble residue, consisting of Silica, Alumina, 
and a little Iron, determined in different por¬ 
tions of the specimen ..... 
Per cent. 
38.36 
Per cent. 
45.00 
Per cent. 
55.30 
Per cent. 
Per cent. 
Iron and Alumina together, about half of each, the 
former as sesqui-oxide, but variable in different parts 
19.52 
12.01 
Mixed earth, taken from different parts 
Manganese (as Mn 3 0 4 . 
Carbonate of Lime. 
of the specimen. 
11.0 per cent. 
4.3 per cent. 
“ I have given the above various numbers to show how, nominally the same 
specimen may differ in different parts ; putting the last numbers in a table, we 
have :— 
Constituents. 
No. l. 
Black Band 
between 
Gravel and 
Chalk. 
No. 2. 
B lack Matter 
in Gravel. 
No. 3. 
Black Matter 
from Jaw. 
No. 4. 
Brown Powder 
from Tooth. 
Matter insoluble in Hydro- 
Chloric Acid 
55.30 
56.31 
62.37 
53.41 
Alumina and Oxide of Iron 
12.00 
15.53 
20.43 
26.70 
Oxide of Manganese (Mn 3 0 4 ) 
10.99 
16.39 
7.25 
12.0 
Carbonate of Lime . 
4.30* 
— 
— 
— 
Loss of Weight by Heat 
(Aq.) .... 
16.70 
9.93 
9.14 
10.40 
Phosphoric Acid, Potass, Loss, 
& undetermined Constituents 
0.71 
1.84 
0.81 
—— 
100.00 
100.00 
lOO.Of 
102.51 J 
“ I may remark that neither in the ‘ black gravel ’ matrix nor in the powder 
from the tooth or jaw was I able to find any lime. 
C. Haughton Gill.” 
In a note, dated 3rd June, 1863, addressed to Professor Williamson, forwarding 
the above results, Mr. Gill adds :— 
“ I must, however, first state that the result can only be considered very 
roughly approximate, as none of the specimens were of the same composition 
throughout, and of the substances removed from the cavities of the jaw and tooth 
the quantities were very small.” 
Note 19.—M. Desnoyers admitted the general similarity of the alleged fabrica¬ 
tions, and their fresh look. (W. B. C.) 
* In all probability from minute adherent particles of chalk. (G. B.) 
f Of this specimen there was only .186 gramme, 
j The whole of the material at Mr. Gill’s disposal was .125 gramme. 
