FUMIGATION, 
was difen yagred by the dando but a farther acquaint- 
ance with chemiftry convinced him of his miltake. (See his 
Defeript.. of the Jail Di ftemper, &c, p, 174. 
With refpe&.to all perfumes, and. other aromatic, re- 
finous, and cae fublances as are Bc! been 
Ces. ee te 
e people an es 
thef- ftrong ftaelling ees are far. bun poteing ts 
wonderful properties attributed to them; in faét, 
oar a ‘eacherows pane aos oe a ur Farnifhes . 
no on on that with wh ich it Hi ie 
0 put a neh 
as end, 
feveral direct ee M. Morveau afeetsned the 
feeble powers of the vapours vola- 
rAraAieE 
tile fubftances, in oe or pedis cs “offen ne 
exhalations ft fro m putri rid animal matter. He fou 
that by burning Phonon. &c. by fpirituous folutions * 
this relins pe of the balfam of Pern, of ftyrax, and of 
myrrh, the odour on hehe fubftances was only ‘mixed with 
that of re putrid m and however dcaaiae inant it was, 
it did not ata him on difcerning t 
ve 
putrid 4 air by an ively difagreeable faint I. (Loc. 
cit. Exper. XII_XV Vv.) The fame obfervation is applicable 
to the vapour of sel which Dr: Lind imagined. was po 
fefled ef fome aii 
Ad acetous acid, 
s, however, that its powers are limited to 
very {mall fare aa therefore that, although it may 
ufeful about the perfons of thofe who are compe elled to be 
ee ae the fick, it is altogether cara . the puri- 
tion of large rooms ; not to m n the great expenfe * 
its ea on. ‘When the nee of cee are attempted 
to be obtained by throwing it on burning rae the greater 
part of the acid is actually oe and therefore its 
efficacy is in a great meafure 1e anti-peftilential v vine- 
gar, or “ vinegar of the four thiewes,” 
extolled, w: . Peg mes ineffe 
air wit agitated : indee 
Gina. a ys ts pretended virtues were faid 
to be derived, are themfelves oa eget the combina- 
tion could not be expected to. poffeffed of much 
power. 
n ‘thofe mineral acids, however, which are capable of 
modern refearch: has difcovered 
gas. hee g 
ys ntage 
poling the miaims of conta pies ae alfo of being: _relpirable 
t of 
in a ftate. of moderate dilution or diffufion, fo as to 
three indus who. may polly haye ‘each been led to 
from the other,. it feems 
ithout any 443 
7 
nple 
prefence of the- Not watilthe year 3295 that Dr..Sm 
{mel oc 
‘with atobacce-pipe or piece of glafs ; the cup n 
to be certain that. Dr, Smyth was the laft to refort.to it ; 
although he was perhaps the firft to der oae| one of thefe acid 
vapours, wiz. the nitrous. - en ii we think 
fatisfactorily, by Dr. John Joh a ne, Of Birm 
his father, Dr. James Johnitone, fenior, had em 
He as of muriatic acid in an eee ae at Kidirmin 
n the year 1756, it in a hi 
=a ‘Diffe rtation’’ conc ae that epidemic, publifhed in 
1758. (Seea pamphlet entitled, « Pcie nt of the- aifco. 
very of the mineral acids in a fate of 
eed 1803: alfo, a “ Reply toDr. J. C.8 
5.) In the year y 
Dijon, _publithe 
of muriatic acid, 
in confequence 0 
ozier, Journ 436 
177 . -) us ingenious chemift appears to have been led to | 
the experiment upon a piece of plaweres that the muriatic 
acid gas would neutralize the niacal falts, whic a are 
erect, during putrefaCtion, “The experiment fueceeded: 
perfect tainted air, before intolerable to ref{piration,. 
de coed of its offenfive qualities. It was. 
‘ope ning sf ie vaults within ite 
~- 
was complet tely 
nitrous aci id ga sas the means oe contagion, and. 
directed an. catenrin anery g made in the Union,’ a. 
hofpi 
5 
rv. & 
mediate effea of i fumigation was to ‘the offen- 
five {mell arifing from fo many fick pee ae - nore: 
of the attendants were epee ae attacked with the fey 
and the general. ftate of the thip was fpeedily snproveds 
sod Report of the experiments, &c. by Mr. A. Men 
8. 
“Bacha is the hiftory of this. difeovery ; >. and 
the éfficacy of 
the nitrous and muriatic fumigation on has 
been confirmed by 
bli in — parts of the kingdo It re~ 
ains for us, Gee fore, to deferibe the mode in ae he 
eal ee is. perfor a 
obtain the nitrous or marine aeid,. in.aftate of va~- 
Dh C. Smith obferves, “ the method is aoe ; 
- It coniifts 3 in de on falt,. 
ea c which. may be done ase 
follows. Put unce of pea acid” (the pie 
luted fulphuric acid, or a of vitriof of commerce): ‘ in 
a crucible, or into a glafs or china cup, or deep ees . 
warm this over a lamp, or in = ne fand, adding to. it 
rom time to time fome nitr n fale: th efe yeflels 
oe ced at bent © or “thirty feet di so nce — ia 
n heat con aed: ji it was: 
ic 
apartments, 
am seer sea i; ae He as and ftro 
vitriolic: 7 or oil of vitriol (about. fix.drachms of eac age 
fyfficient ); mix them in a tea-cup, itirring. them cecalionally 
mutt be re-- 
moved occafioually to different parts. of the room, a the- 
Meese 
oR 
“'S 
