Chenncal Nomenclature of Berzelius. 253 
of two electro-negative bodies, which have an atomic constitution 
corresponding to that of an oxide of the least electro-negative ele- 
ment ; for example, we should say phosphoric chloruret,(a) carbonic 
chloruret. . 
In the chemical nomenclature used in France, the different de- 
grees of oxidation are denoted by the Greek particles, proto, deuto, 
trito, prefixed to the name derived from the electro-negative ele- 
ment. The highest degree is frequently expressed by the Latin 
particle per. 
Ihave thought it better to depart from this method, because the 
resulting names are not manageable in the nomenclature of the more 
complex combinations. I therefore use the terms, ferrous oxide, 
and ferric oxide for protoxide of iron, and deutoxide of iron. We shall 
see in the sequel the advantages which result from this nomencla- 
ture when applied to the salts in their different degrees of neutrali- 
zation. Iridium and osmium have more than two oxides which 
form salts; I prefix to the regular name of the oxide the particle 
sus,(7) and say susiridious oxide, susiridic oxide, as will be seen in 
the enumeration of the oxides. 
Certain metals have oxides which contain so little oxygen as to 
be unable to combine with other oxidized bodies. I call these, subow- 
ides.(8) Other metallic oxides on the contrary, are too highly oxi- 
dized to combine with other oxidized bodies. I call these superox- 
ades.(9) The Greek particles, hypo and hyper should, properly, be 
used in these cases, since the word oaide is of Greek origin, but 
they are too much alike to be used without confusion. 
The nomenclature of oxidized bodies being given, that of the 
other binary combinations is strictly in accordance with the princi- 
(a) The phosphoric chloruret is proportional to an oxide of phosphorus; the car- 
bonic chloruret to the oxide of carbon. That is, the equivalent of oxygen in each 
case is replaced by an equivalent of chlorine.—Trans. 
(7) Susoxide. The term in the French translation is susoxide. The derivation 
I suppose to be from the Latin sursum, through the French sus. The French par- 
ticle sus is only used as in the following sentences, “ quart-en-sus,” (one fourth 
more.) *€ tiers-en-sus,” (one third more.)—Trans. 
(8) Suboxide. In the French translation sowsoxide.— Trans. 
(9) Superoxide. In the French suroxide.— Trans. 
Vou.— XXII. No 2. 33 
