Heinrich Rose. 315 
the gas in the open air through a very fine tube of glass, (durch 
eine sehr diinne Glasréhre,) 8 feet ‘in length, of which 7 feet 
to} 
2(P +20) + 3HO = PO, + PH, 
This result was then confirmed by direct analyses of remarka- 
ble elegance, and which are well worthy of attention. 
_ Besides the compounds of PH, with certain volatile chlorids, 
We owe to Rose the discovery of a class of bodies in which ammo- 
nia is combined with the chlorids of various metals, and the very 
remarkable combinations of the anhydrous acids with ammonia 
and with salts, the first instance of which, the union of sulphur- 
Ous acid with ammonia, was ooserved by Dobereiner, but which 
Rose now first fully investigated. He made known too the true 
Rature of what had been considered as the superchlorids of 
chrome, wolfram and molybdenum. The composition of the 
Volatile metallic chlorids which are decomposed by water into 
ydrochloric acid and a metallic oxyd, had hitherto been infer- 
red, without analysis, from that of the oxyd. Rose, determining 
h the chlorine and the chrome in the red volatile liquid pro- 
duced by the action of sulphuric acid upon a mixture of chlorid 
of sodium and chromate of potash, found a great loss in his 
analysis; and that the chlorine was in quantity to combine only 
with a third part of the chrome. It followed that the liquid in- 
Stead of being a chlorid of chrome, corresponding in composi- 
tion to chromic acid, contained a large amount of oxygen, and 
could be considered as a compound of two equivalents of chromic 
acid, and one of perchlorid of chrome. fs 
wo compounds of wolfram and chlorine were known, which, 
‘tough entirely different in appearance, were supposed, as they 
had n found to give with water hydrochloric and wolframic 
acids, to have the same composition, and to be isomeric bodies. 
The one of them, which sublimes in small, yellowish white 
Scales, was shown by Rose to contain oxygen and to be in com- 
