1874.] 



on Fired Gunpowder. 



415 



the following statement is given of the percentage composition of the 

 products of explosion, under one or two different pressures, of the three 

 principal powders used. 



TABLE II. 



Showing illustrative Examples of the Analytical Results obtained. 

 Pebble. E. L. Gr. F. G. 



Pressure of explosion in tons 1 



per square inch J 



Percentage weight of solid pro- \ 



ducts J 



Percentage weight of gaseous \ 



products J 



Percentage weights of solid products of explosion : 



Potassium carbonate 55'50 56;15 



sulphate 15-02 11-93 



hyposulphite 20-73 6-12 



monosulphide 7'41 19-12 



sulphocyanate 0'09 



nitrate 0'48 



oxide 



Ammonium sesquicarbonate 0*16 0'08 



Sulphur 0-61 6-17 



Carbon trace trace 



Percentage volumes of gaseous products : 



Carbonic anhydride 46-66 49'82 



Carbonic oxide 14*76 13*36 



Nitrogen 32-75 32-19 



Sulphydric acid 3'13 1-96 



Marsh-gas 0'58 



Hydrogen 270 2-08 



Oxygen 



1-4 12-5 

 56-12 55-17 

 43-88 44-83 



0-23 

 0-20 



1-6 35-6 

 57-22 57-14 



42-78 42-86 



3-7 18-2 



58-17 58-09 

 41-83 41-92 



52-56 

 20-47 

 20-37 



4-02 

 trace 



0-56 



65-71 

 8-52 

 8-59 

 7-23 

 0-36 

 0-19 



59:39 

 24-22 

 5-30 

 5-12 

 0-02 

 0-08 



0-06 

 1-25 

 0-71 



48-99 

 8-98 



35-60 

 4-06 

 0-29 

 2-07 



0-18 

 9-22 



51-79 

 8-32 



34-64 

 2-61 

 0-41 

 2-04 

 0-18 



0-15 



5-72 

 trace 



47-41 



12-35 



32-35 



3-76 



43-03 

 21-00 

 32-07 



6-23 

 0-19 



2-98 

 0-03 

 0-47 

 trace 



53'02 

 7-91 



34-20 

 2-03 

 0-50 

 2-13 

 0-15 



TABLE III. 



Showing the composition by weight of the products of explosion of a gramme 

 of powder as furnisJied by the above examples. 



Pebble. E. L. G-. F. G. 



grm. grm. 



Potassium carbonate -3115 -3098 



hyposulphite -1163 -0338 



sulphate -0843 -0658 



sulphide -0416 -1055 



sulphocyanate '0005 -0013 



nitrate -0027 -0011 



oxide 



Ammonium sesquicarbonate -0009 '0004 



carbon 



sulphur -0034 -0340 



Total solid -5612 -5517 



Sulphydric acid -0134 -0084 



Oxygen 



Carbonic oxide -0519 -0473 



Carbonic anhydride -2577 -2770 



Marsh-gas -0012 



Hydrogen -0007 '0005 



Nitrogen -1151 -1139 



1166 

 1171 

 0230 

 0000 

 0032 



rm. 

 755 

 0491 

 0487 

 0413 

 0021 

 0011 



grm. 

 3454 

 0308 

 1409 

 0298 

 0001 

 0005 



0003 

 0072 

 0041 



0009 



0527 



5722 -5714 

 0166 0077 



0009 

 0333 

 5817 

 0154 



grm. 

 2499 

 1863 

 1220 



0013 

 0011 

 0173 

 0002 



0303 

 2597 

 0006 

 0005 

 1201 



0356 

 2750 

 0015 

 0003 

 1085 



0416 

 2512 



6016 



1091 



0027 

 5808 



0081 

 0006 

 0258 

 2718 

 0009 

 0005 

 1117 



Total gaseous -4388 -4483 -4278 -4286 -4183 -4192 



