GUN-COTTON AND GUNPOWDER. vp a 
(a) Ordnance powder—For the quantitative determination of the products 
of combustion 36.8366 grammes were used. 
The gas passed into three absorption tubes amounted to 75.3 cubic centimetres ; 
the gas issuing from the mortar until the rest was under the atmospheric pres- 
sure amounted to 5480.7 cubic centimetres at 16° C. and 0.749 metre pressure ; 
under these circumstances the mortar holds 5216 cubic centimetres; hence the 
above quantity yielded 7621.96 cubic centimetres gas at 0° and 1 metre pressure. 
The absorption analysis produced— 
Vol. at 0° 
Volume. | Pressure.| Temp. |and1 metre 
pressure. 
° 
Original volume....-.--.-----------+--+----- 16, 2 51. 63 
After absorption of CO? and HS....-..-.-.-- 14.3 29. 12 
From the estimation of the potash bulb with iodine solution, it followed that 
the sulphuretted hydrogen corresponded to 0.44 division. Hence the above gas 
consisted of 0.44 vol. sulphuretted hydrogen, 22.07 carbonic acid, and of 29.12 
nitrogen and combustible gases. 
The explosion analysis of the gas freed from sulphuretted hydrogen and car- 
bonic acid and transferred to the eudiometer was as follows: 
Vol. at 0° 
Volume. | Pressure.; Temp. |and1 metre 
pressure. 
fe) 
Original volume. ........---..------------- 113. 26 0. 2729 15.6 28.8 
AL LeraCCINOM) Ol Gls cosccctecc< S=pacc snmnis' 183. 36 0, 3494 16.8 60. 36 
After addition of oxygen. -.-..-----.-------- 204, 32 0. 4295 16.4 Ae79 
After explosion .....------ -+----------+.-- 185, 62 0. 3522 15.4 61. 89 
After absorption of CO?....-.:.-.+--4..--: 167.90 0. 3476 15,1 55, 31 
Aner addition: Of ERoos on eas-<s stems eis 224, 67 0. 4068 16. 2 86, 39 
After explosion. .-.-...-------------------- 166. 38 0. 3395 15.7 52. 79 
By applying the formule of the gasometric methods. already mentioned in 
the analysis of gun-cotton, since the gases are qualitatively the same, the values 
are obtained, for carbonic oxide 5.21, hydrogen = 3.03, marsh gas = 1.38, 
and nitrogen 19.18. 
Hence the total gas calculated for 100 parts consisted of— 
Vols 
Gorhonke ewes. dioiteisiea, 40 slo BO tosis okik kee, COAL 8 42.74 
Sulphurettedsbydrogen Lwin spies pies oie se SUB PUS UL 0.86 
Carbonic Oxide ys: = -,- -:-\« pvae:epomedis drain ae DIELIGOD RUM, PU ALS 10.19 
Mawah passiscislss il) .wombiess Dige Als i. SL 2.70 
Bl ydmogern sis wiecses Ch. sidicpniaiaje Sd calaegiee ye 21 ee ilaisio dl 5.93 
Wateogenl” «ici Beit Le Glaidisise-chaba) PROWL eA MH Ld OE 37.58. 
100.00 
The determination of the solid residue in the mortar was effected, after remoy- 
ing the gases, by digestion with water, which was drawn off through a tap in 
the bottom and rapidly filtered. 
