GUN-COTTON AND GUNPOWDER. 231 
The results hitherto obtained for the products of combustion of both kinds 
of powder may now be compared with each other, and also with those obtained 
by Bunsen and Schischkoff in the analysis of sporting powder: 
I.— Composition. 
\ 
Sporting |Small-arms) Ordnance 
powder. | powder. | powder. 
77.15 73. 78 
NasterOr POLE. he o> 35 pets angels nana nba’ pare one 78. 99 | } 
oo SRR Ss Se ese ee = JAE CR Seah eaeoe 9. 84 8.63 | 12. 80 
Warbonl 2126s Ns tS oath cee ene ke oe 7.69 | 11.78 10. 88 
Hy dtorent wc at 355 bean erase = Se eh 0.41 0, 42 0. 38 
Sree" y Oxygen 5 detestoh. -1-wsaeterc shoes 3.07 1.79 1.82 
TAS Yas SAA ees ee et A ees Sane 0. 00 0. 28 | 0.31 
oe 
100. 00 100. 00 100. 00 
| 
Il.—Gaseous products of combustion by volume. 
ISM E AES So5 Gos uecnbeoso Bone Tol p sc acocecme 2. Age 41.12 35. 33 37.58 
CO HEDOUICIACL Oe reme sci michineise se see a inciae aiscere a as 52. 67 48. 90 42.74 
RarbONiC OX10C).. << os amen ae asnaue vb aigmetasp eee 3. 88 5.18 10,19 
LEGER s « Olae cao aEoone Sao desuoonoesac HonadsesssuS 1,21 6. 90 5. 93 
Balpigrented Byarogen oe ooo). - cone mafrmmn migininanaisyeisins 0. 60 0. 67 0. 86 
Orey fear: 2 Getto eee see eee as sec meer Behe O. So Asses OBL 
Biarshie 38. eco tstew hid + enon andes gn ela es Sore eee es 3. 02 | 2.70 
100. 00 | 100. 00 | 100. 00 
IIl.— Total products of combustion by weight. 
Renine OLipOnae tines cee ee ec oe eee asceiece eee tejod 42,97} 36.17 36. 95 
Carbonate of Potashex: jek: 2 is os Sh ei ek Sete - 12. 64 20.78 19. 40 
Hymposulphite tof potashie. 4). scisc-siysee ses = ees eK 3.27 LAN er 2. 85 
Bulpimade'of potagsiunal. 626 ots £2. ew chee dal= eile ais Pailey Reactions ose 0. 11 
Sulphocyanide of potassium ..............-----+------- ESN ee ae eae |S See ee, 
iNrirate-of potashey% ta icles kako Nees eee ale Soon ee senor ee Samoan ee 
Charcoal 2 271. -.sis.s.aslecnisieeieitoaisn's, sss sie nas ee ecmiebiee 0.73 2. 60 2.57 
hal) 1 net ry ore PE Re ee ae tse Be ek 0,14 1.16 4. 69 
Sesquicarbonate of ammonia........--.-.----.---.---- 2.86 2. 66 2.68 
Nitgppenasisisct jos ethee ct doce tec eadeeetich eke hh ! 
BENE TTR TEC I RAE I(t: : 
Warbomic Oxide po.2). osc )s'- <2 52 socdac coceittecias 9 ees 
PUGOTOCC MN Won eee aoe tales ee sven selee ceeeeees sees 
Sulphuretted hydrogen 
“LS SELES Ss SEAS RN Sok ip Dae A Bd 
PMSS DN PES) ere seeps om mig orca, Jae piacicie a mab elects motes |emneapoeea Se 
eae ann amie pie ne Sanne peepee rer pe ser lac =e 
A comparison of these results shows at first sight that, on the whole, the 
products of combustion of powder are little dependent on the manner in which 
the combustion takes place. But that the composition of the powder has a great 
influence, is seen from the fact that in Bunsen’s powder, which contains much 
nitre, nearly 4 per cent. of this substance are found in this residue; while, on 
the other hand, in the residue of the ordnance powder, whieh contain less nitre, 
almost seven per cent. of sulphur and charcoal are separated unburnt. The 
influence of the composition on the nature of the products of combustion is still 
