454 
SIR ANDREW NOBLE: RESEARCHES ON EXPLOSIVES. 
explosives, and I have accordingly completed a similar examination of three other 
explosives, and the composition of the six explosives was approximately as follows :—- 
I. 
II. 
Mark I cordite. 
Percentage. 
M.D. cordite. 
Percentage. 
Nitroglycerine. 
58-0 
Nitroglycerine. 
30-0 
Nitrocellulose. 
37-0 
Nitrocellulose. 
65-0 
Mineral jelly. 
5-0 
Mineral jelly. 
5-0 
III. 
IV. 
Norwegian 165. 
Percentage. 
Norwegian 167. 
Percentage. 
Nitroglycerine. 
36-0 
Nitroglycerine. 
40-0 
Nitrocellulose. 
52-0 
Nitrocellulose. 
50-0 
Nitronaphthalene. 
6-0 
Nitronaphthalene. 
5-0 
Secret ingredient. 
6-0 
Secret ingredient. 
5-0 
V. 
VI. 
Italian. 
Percentage. 
Nitrocellulose. 
Percentage. 
Nitroglycerine. 
47-1 
Nitrocellulose (sol.). 
85-5 
Nitrocellulose (sol.). 
52-3 
Nitrocellulose (insol.) .... 
14-5 
Nitrocellulose (insol.). 
0-6 
The results of my experiments with Explosives I., II. and VI. have been given in 
my ‘ Researches on Explosives/ Part III., # and if reference be made to Plates 8, 9 and 
10 in that paper, it will be seen how well, on the whole, the curves, showing the 
variation in the percentages of the gases, represent the observations. Similar curves, 
representing very accurately the observations, are now given for Explosives III., IV. 
and Y. Some doubt might, however, be felt as to whether the transformation of the 
same explosive at the same density might be relied upon as being practically 
identical, and to test this point the following experiments were made :— 
In Experiment 1586, a charge of Explosive III. at a density of 0'4 and pressure 
* ‘Phil. Trans./ A, vol. 205, pp. 221, 222 and 223. 
