NIT 
the fame appearance, and are brought to the fame flate, 
the addition of the water expelling completely 1 the nitrous 
oxyd, which is loofely united with-th e nitric acid to form 
dn one Ta the 
change the nitrous into 
urray (Mat. 
Med.) juftly obferves, that the heat of a aero e is beft 
adapted for this operation, being fufficient for the purpofe, 
Nitron xi, as the term is paiablogerys in hs rues 
d fluid, emit- 
Strong fluid afer meri is ced only for pharmaceutical 
purpofes ; except when extricated in the form 5 
Acidumnitricum dilutum, L.E.D.; Oxydum eee Ts 
Argenti nitras, D.; ” Liquor ferri alkalini, L.; Ung. 
hydrargyri nitratis, L, E. D ydrargyri nitricum oxy- 
dum, L. ; Spiritus ztheris nitric, L, E. D.; Unguentum 
acidi nitrofi, E. 
e diluted nitric acid, L., is prepared by mixing 
NIT 
fame acid, prepared after the Edinburgh and Dublin, and 
the former London tara contains grs. xxxv of the fame 
acid ; a difference, which, as it may lead to errors in prac- 
tice, is to be regrette 
itric acid is tonic and antifeptic. When largely a 
with water, it forms an agreeable and ufeful beverage i 
fevers, particularly of the typhoid type. In larger ee 
lefs diluted, it has been an on ee with effe@ in chronic 
hepatitis, even when dropfy has fupervened ; and it has alfo 
been ferviceable in reftraining violent ficknefs, in dy{pepfia,’ 
afthma, and the greater number of cachexiz. From obfer- 
fervations of Mr. Scott, publifhed at Bombay in 1796, 
acid excited attention as a remedy for fyphilis; but after 
the moft ample trials, by almo 
nence in the country, its /ntifyphilitic sede have not been 
tho 
Ithough it gives a apy check to the 
progrefs of the difeate, it does not permanently remove the 
rv. Pearfon juitly obferves, it would 
by no means be eae to fubftitute the nitrous (or 
nea acid in the place of mercury, for the cure of vene- 
real complaints. It has been found, however, of confider- 
able fervice when given at the fame time with mercury, in 
old obftinate ulcerations of the legs, although no venereal 
taint could be fufpected ; and it 1s employed with benefit 
as a local ftimulant in the form of lotion, in the propor. 
tion of £3ij of the acid to oj of water, to foetid ulcers, 
attended with a thin ichorous difcharge, and in caries of the 
bones. In India it is fometimes ufed in the form of a bath, 
Submurias hydrargyri aN E. D. ; 
ydrargyri ammoniatus, D.; um hydrargyri cine- 
reum, E. D.; Oxydum ae eae rubrum, E. See 
Mercury. Thomfon’s Lond. Difpenfatory, 18 
Nirric Oxyd, in Chemifiry. This fubftance, like the nitric 
acid, is a compound of nitrogen with oxygen: the former 
bee formed of 1 atom of nitrogen ta 2 of oxygen, the 
latter 1 to 1 
Several of the metals, as ilver, neatly and copper, 
t of 1 atom o 
ae 
0 procure nitric oxyd, introduce cana bits of copper 
into a gas bottle, or a fmall etort, upon which pour nitric 
Let oona 
then combines with two other atoms of acids 
F wo atoms of nitric oxyd, refulting from 
the decompofed acid, would be abforbed by the remaining 
i ufficient eal were by which it 
increafes ; nex a pote and 
etter obec of thefe fha 
fhould be employed a of copper ; fince the folutions of 
copper in any aci of green colour. When, howéver, 
the excefs of acid is of great in producing nitric oxyd, a 
great proportion of this gas is evolved. For common pur- 
