532 Mr. PoRRETT on the nature of the Salts 
also of this kind, but I have not had leisure to investigate 
particularly the acids that may thus be formed. 
That with sulphur however has engaged much of my at- 
tention, as may be seen by reference to the continuation of 
this Paper. 
The true nature of the triple prussiates being, as I hope, 
now developed, an alteration in their nomenclature appears 
indispensible, as those salts can no longer with propriety be 
called triple salts which have but one acid and one base, nor 
can they be called prussiates which do not contain any prussic 
acid. Besides, it seems full time that the term prussiates should 
be restricted to the simple compounds of Prussic acid with 
bases, and that salts so very different from them, as are the 
triple prussiates, should have a name so dissimilar as to pre- 
vent for the future any farther confusion between them ; I 
propose therefore for the acid composed of the elements of 
the Prussic acid united with oxide of iron, the name of ferru- 
retted chyazic acid, for that composed of the same elements 
with sulphur the name of sulphuretted chyazic acid, for those 
consisting: still of the same elements with metallic oxides ana- 
logons names, as argenturetted chyazic acid, &c. the word 
chyazic being composed of the first letters of the acidifiable 
elements of the acid, viz. carbon, hydrogen, and azote, to 
which is added the termination ic. 
I shall now relate some analyses that I have made of the ^ 
triple prussiates, or as I shall henceforth call them, the ferru- 
retted chyazates. 
