GAS. 
Relative Weights Spee Heat of 
of ultimate Particles. al Weights. 
‘Olefiant a - - 6 = 1555. 
Nitric acid + - - 9 - =. 491 
Carbonic oxyd - 12 - - 777 
pcan nyeeer - 16 - - 583 
Muriatic a - 22 - - 424 
Aqueous ae - - 8 - - 1.166 
Ethereal vapour - - Il - - 848 
Alkoholic vapour - I - - 586 
Loa 1,000 
ature of stmpoundl Gafes by a ona gas we 
mean an, lati fluid which arifes from the chemical union of 
the eleme or more elaftic fluids, or of one elaftic 
fluid and another neat Ei ; spec a awe quantity: of 
com mbined fo as 
difcoveries, and their nature has never yet been very fatis- 
factorily explained. They are obferved to agree h the 
fimple gafes in their pee eran relations. From this fact 
it would feem that by.applying the Newtonian doGtrine they 
rautt be conftituted of pred repulfive c oF on h other, en 
all spies of the articles oft ite simple gales 5 ; 
that is,.a particle of a fim ple gas, A, muft be u 
one, or more, particles of another body B; saat new 
compound may be furrounded aie) an atmofphere of heat, 
and form a particle of a compound gas nthis way, if 
we may fuppofe all ultimate particles of the fame kind to be 
exactly alike, a of various, but fimple relations 
in quantity, fuch as thofe of 2 = 3, may be formed ; and 
e fuch relations. 
eo 
Oe 
Stenting that i if a gna of the latter gas contain 
oxygen, a particle of the former muft contain two peariles 
oT oxygen, 
. The Nature af pe ee Mixtures.—Dr. Pri 
ee of his interefting enquiries in pneumatic chemiltry, 
Gould {earcely fail to notice a eens fa&t which fubfe- 
quently has ocgafioned much difcuffion ; namely, that gafes 
of ‘different {pé Sbific ane intermix imoppofitien to ‘theit 
ieee bendenzice. and when once fanting tok diffufed 
eftley, in the 
ae 
by Dalto bee in the M: anc ae nanan ie i.new ferics, and 
by Berthollet, in the fecond volume of the Memoires d’Ar- 
ueil, The ne of thefe philofopher s, however, finds a 
oni bee difference in the fimes which the different gafes 
to become uniformly diffufed through each ‘other. 
Thus, hydrogen is diffufed more quickly, and. carbonic acid 
atmofphere is an example 
e 
ake 
o 
this might perhaps be admitted, were it only require 
_ count for gafes remaining in a ftate of diffufion, yet it does 
not: provide for ‘a heavy gas, as carbonic = being 
ie up to. the top of a receiver to the diftanc xt 
or more from its natural “Geaation, 
counts was 
e Lhe that 
nt gafes w were neither attraCtive nor re- 
re but neutral; fo that ar 
hypothefis the author himfelf has abandoned, and now, in 
confequence of further elucidation which time and ore 
tion have produced, he afcribes the.effeCts in queftion 
different fizes of the ultimate elaftic particles of different 
fluid can reft permanently on another, unlefs they fea 
to have ultimate particles of exactly the fame fize, which pro- 
bably does not take place in are! two gafes. This explanation 
deferves ae 3 time w how far it is a ory. 
See New of Chemical Philfophy, page 
me eee Re with each’ “other ; 
others are ses iffufed ees - oe whole fpa Of 
fome of thefe mixtures it may be proper to take a little no- 
ice. 
ydrogen mixes ‘with azote, nitrous gas, carbonic 
ox xyd a acid, carburetted, fulphuretted, and. phofphu- 
retted hydrogen, ammoniacal gas, &c. without es 
any change. 
. Hydrogen mixes wiih oxygen and nitrous ee 
any ‘change ; ; butan electric {park unites the o oxygen to the 
hydrogen, and forms water, and in the latter cafe azotic ‘ga 
likewife. 
- Hydrogen mixes swith oxy-muriatic acid without any . 
with- 
alfo be produced by expofing the mixture of gafes to the 
fun’s rays, when after a few moments an explofion takes 
place. 
4. Oxygen and nitrous gas inftantly combine and form 
nitric or ete ous acid; oxygen mixes es moft or all other 
Jeep hout any change ; but an elettric {park unites it to 
me nena when mixed with ae oxyd, olefiant gas, 
euccek fulphuretted, and phofphuretted hydrogen, and 
saree gas. 
= 
5. Azotic gs mixes with all other gafes without any 
change. 
. Oxymuriatic acid gas converts nitrous oe into nitric 
aca. When mixed with hy ydrogen, and ex ito light, 
sare and muriatic ae are formed 3 if ey a the dire 
a the fun n above 30° of. alt ae an explofion 
Luffac, and 
When 
mixed with with carburetted hydrogen, carbonic oxyd, or 
olefiant gas, and expofed'to the fi over water, a pretty ra- 
pid combuition ate Moit of thefe mjxtures. too ex plode 
‘an eleGric fpark, that. with carbonic oxyd excepted. 
This gas acts upon dulphuretted and pho{phuretted hydrogen 
gafes in oo } and converts fulphurous acid gas into {ul- 
huric 
. ey ener acal gas combines ve the feveral acid gales 
and forms with them falts. 
4 Tables 
