GUN-COTTON AND GUNPOWDER. ‘299 
potash were thus obtained, corresponding to 2.0786 grammes of potash. Hence 
100 grammes of ordnance powder contain 33.85 grammes of potash, which 
agrees closely with the result of the direct analysis of the powder. After find- 
ing, by direct observation, that 36.8366 grammes of the powder furnished 
7621.9 cubic centimetres of gas, the composition of the products of combustion 
of this powder may be stated as follows :— 
SSM aerate OLAS: a4 2) (sabtneia Sew Wie ciieccake c's/sla's 4 Cee 2 sh ee 13.61 
Demerarerol potas ys See oe Were om th ett os Sen vere ae Ala 
Papocdlabiteol potaslns. a. - 222 ae ee Se eee See a 1.04 
Sulphide: of. \potassiuitit.4... shies close ane ons seule 0.04 
WhrarcGals S25 USA 7 ES Pic ya ae LD ur edie’ 0.94 
| PLATT eR RE tet de ea etalk ah ine 4 Ld a age 1738 
Sesquicarbonate Om AMMONIA es al, ees et a dee eee ee ER Meee ane 0.99 
TRUELO REN Cpr laat sin ci ale seca sce pnwg wns cae nck ne oe ee TED 3.60 
( ustta] Geo? Gee Vo) 1 Lane ep aden Ra ad LE EES SPEIER RCRA ROLAE EAI! ) RSS Lag 6.40 
RaB IG Maleetusee ay Ses cs elt oo wees (SIS vedo ee oa ud Wes re 0.97 
Siytlrowen 2 sas tae set a a eek ee a ret tae eater errant RS 0.04 
Sulphuretted- hydrogen 15sec ese scec eee e crew tebe ik 0.10 
MPaboh Pis< sc62s cess shee cece e stp h eee ee ee eenes teed eae 0.15 
Se UNOS S SAS 228s SRS GOERS Bes Side aes Ss ee 0.07 
36.82 
in which sulphur and charcoal are calculated from the deficiency. 
(6) Small-arms powder.—34.153 grammes were used for the combustion. 
The quantity of the gaseous products was obtained from the following gaso- 
metric experiments: 
Absorption analysis. 
Vol. at 0° 
Volume. | Pressure.| Temp. and 1 metre 
pressure. 
1°) 
Gngmal volambs-sress2ccs-2 tosses seals 136. 94 0. 6331 22.1 80. 21 
After absorbing CO? and SH....--........- 75. 04 0. 5024 21.9 40. 46 
If the solution of the potash-bulb is determined with solution of iodine, it 
is found that 0.535 division corresponds to sulphuretted hydrogen, from which 
it follows that the above quantity of gas consists of— 
RMRNOMIC BE EUS). FAO NAMak UN ee tT, uti Sah eeleneustslaisle 39.22 
Sulphuretted hydrogen. ...2....00.2.- Be EL PE ae EL NT EN 0.53 
Combustible gases and nitrogen............... Gees. ene oe 40.46 
