I 6i 7 3 ' 
©f bulk, p. 41 1. Experiments on the products which refult from the combuftion of 
fulphureous hepatic with pure air, p. 412. Hepatic air procured from an addition of 
marine acid to an artificial combination of fulphur and iron, ib. Pure air, and ful- 
phureous hepatic air obtained from artificial pyrites by the marine acid, being fired 
together, in certain proportions, produce fixed vitriolic acid, with a frnall quantity 
of volatile vitriolic, and marine acids, in an aerial form, p. 4140 If hepatic and 
pure airs be fired in equal bulks, the refidue will have a Ihrong odour of volatile vitri- 
olic acid, and contain a frnall proportion of undecompofed hepatic air, ib. The 
converfion of fulphur into volatile or fixed vitriolic acid depends upon the quantity 
ox pure air with which it is fupplied, ib. Sulphureous hepatic being burned with 
atmofpherical air, produces a change of part of the fulphur into vitriolic acid, and a 
precipitation of the reft ; but when it is burned with a fufficient quantity of pure 
air, the fulphur is wholly converted into vitriolic acid, p. 415. Specific gravity of 
hepatic air, nearly equal to that of pure air, it , Hepatic air fuppofed to be fulphur 
which has acquired an aerial form by the application of heat, p. 416. An oily matter 
produced by the union between fixed air, volatile alkali, and animal hepatic air, ib. 
A fubftance, having the appearance of oil, formed by the combination of fulphureous 
hepatic air with fixed air and volatile alkali, p. 417. O11 the air extricated from 
animal fubftances by putrefaction, p. 418. Aerial fluids, which are extricated from 
the mufcular fibres of animals by putrefaction, confift of fixed and animal hepatic, 
mixed with a very frnall proportion of phlogifticated air, p. 419. An aerial fluid, in 
moft of its properties refembling animal hepatic air, obtained, by diftillation, from 
the green leaves of a cabbage, ib. On the effe&s produced by expofing frefh animal 
fubftances to atmofpherical, hepatic, and pure airs, p. 420. The mufcular fibres of 
animals contain fixed and phlogifticated airs, the inflammable principle in the ftate of 
heavy and light inflammable airs, and a fubftance which, by means of heat or of putre- 
faction, is capable of being converted into animal hepatic air, p. 422. Animal 
hepatic air lofes its fetid odour when mixed with pure air, and fullered to remain in 
contaCl with that fluid feveral weeks, ib. The fetid odour of animal hepatic air 
likewife deftroyed by agitating it with vinegar, or with the concentrated vitriolic acid, 
p.423. Animal hepatic air imparts to the fat of animals, recently killed, a green 
colour ; it renders the mufcular fibres foft and flaccid, and incrxafes the tendency to 
putrefaction, p. 424. A medicine which would decompofe the hepatic ammonia, 
and deftroy the fetor of the animal hepatic air, without increafing the morbid aCtion 
of the veflels, would, probably, be productive of falutary effcCts in the cure of can- 
cers, p. 425. Nitrous acid does not deftroy the fetor of hepatic air, unlefs it be 
highly concentrated, ib. The fetor of hepatic air quickly difappears when mixed 
with dephlogifticated marine acid, ib. Dephlogifticated marine acid has the power of 
deftroying the colour, the fmelf, and perhaps the tafte, of the greater part of animal 
and vegetable fubftances, ib. 
Vol. LXXX. j 4 L 
Aldington. 
