< 
by the reciprocal Action of Sulphur and Charcoal. 4\\ 
obtained. “The lengthening tube contained a greater quantity 
of reddish-brown matter. 
Operation V. To the residue from the preceding operation was 
added 1-500 kilogramme of the same substance. 8°S grammes 
of a milky liquor resulted from this operation. 
Examination of the ethereated liquor *. Overlooking the pro- 
ducts of the first and fifth operations, which were merely water 
saturated, the former with sulphuretted hydrogen, and the latter 
with sulphurous acid, | collected the liquors of the second, third, 
and fourth operations, which seemed to be identically the same. 
They were introduced under distilled water into a small glass re- 
tort, the beak of which entered into the neck of a tubulated 
matrass filled with distilled water up to the bottom of the neck, 
so as to make the gasified matter arrive immediately into the 
water, without the latter being able to reascend into the retort. 
To the tubulure of the matrass was fitted a tube for collecting 
the gases. The whole being closely luted, heat was applied, and 
120 grammes of a limpid and volatile colourless liquor were ob- 
tained. Its specific gravity was obtained by filling a bottle 
with a ground stopper, which weighed, the temperature being 
20°, 100-357 grammes; when full of distilled water, 167-712 
grammes ; and when full of the liquor, 185-423: hence it weighed 
1-263. Its taste was acrid and caustic; smell fetid, very pun- 
gent, and not at all resembling that of sulphuretted hydrogen : 
it is in short a smell per se. 
Its elasticity (tension) is very great: it was found, as will be 
afterwards seen, from 03154 metre to 0°7527 metre of pressure, 
and 22° 5° of temperature. 
It is not very soluble in water, but very soluble in alcohol. 
This solution when poured into the water rendered it milky, like 
the volatile oils and resins precipitated by water from their al- 
coholic solutions. M. Vauquelin thought that this precipitate 
was sulphur in a very minute state of division f ; but I have as- 
certained it to be the liquor itself, apparently not altered, and 
abandoned by the aleohol, which unites in preference with 
the water. This liquor being in astate of extreme division, 
and heing but slightly soluble in water, affects its transparency, 
and gives it a milky appearance, analogous in fact to that pro- 
duced by sulphur slightly hydrogenated, precipitated from the 
sulphuretted hydrosulphurets by an acid: but this cannot from 
_ the nature of things be sulphur. When we pour this alcoholic 
solution into a great quantity of water, the turbidness which is 
at first formed disappears entirely, on account of the solubility of 
* Thus [ denominate the liquor obtained from pyrites calcined with 
charcoal, or directly from sulphur and charcoal when exposed to a high 
temperature. t Annales de Chimie, tome Ixt. p. 151. 
the 
