SIR ANDREW NOBLE: RESEARCHES ON EXPLOSIVES. 



213 



Difference 



+ 0-08 



-0-03 



0-00 



+ 0-47 



Experiment 1401. At a density of 0'4 a charge of 128'5 grammes of Rottweil 

 nitrocellulose E.R., giving a pressure of 34 - 9 tons per sq. inch (5320'0 atmospheres), 

 generated 88,689 cub. centims. at C. and 760 millims. pressure, also 15 '2 3 grammes 

 of water = 18,946'! cub. centim. of aqueous vapour at C. and 760 millims. 



GAS ANALYSIS. 



Hence we have 690 '1 cub. centims. of permanent gases, or 8 46 "8 cub. centims. 

 including aqueous vapour per gramme of explosive. Proceeding to reconcile the 

 elements, we have : 



