Chemical Nomenclature of Berzelius. 275 
ture are also increased. ‘This difficulty begins to be felt in the double 
salts. In Latin the namesof the two bases may be combined so as to 
make but one word, as for example, sulphas ammonicoferrosus, cyan- 
etum ferrosoammonicum. ‘This method cannot be applied in transla- 
tion, without adopting throughout the Latin termination for the first of 
the two bases; we are therefore obliged to say, ammomic and ferric sul- 
phate; ferrous and ammonic cyanuret.(73) 
As the composition of these salts varies, several atoms of the one 
salt combining with a single atom of the other, we may express the 
relative number of atoms in the name; as, for example, triferric am- 
monic sulphate, biammonic ferrous cyanuret. 'The following are in- 
stances of a similar kind: 
Trialuminic potassic sulphate. Alum. 
Biplatinic ammonic chloruret. | Muriate of platinum and ammonia. 
Triboric potassic fluoruret. Fluoborate of potassa. 
Bisilicic sodic fluoruret. Fluosilicate of soda. 
The same nomenclature may be applied to the double amphide salts 
having an excess of base, by placing the word sub before the name 
of the acid. Thus we say cupric biammonic subsulphate, (cuprum 
ammoniacum of the Pharmacopeeia) bealuminic, trialuminic, sexalu- 
minic potassic subsulphate. We must observe however, that a no- 
menclature is easily spoiled by attempting to express too much by it, 
the names being thus rendered either too complex, or disagreeable 
to the ear. 
NOMENCLATURE OF THE SALTS OF AMMONIA. 
Before closing this chapter on romenclature, we must call the at- 
tention of the reader to the difference between the meaning of the 
terms salt of ammonium, or ammonic salt, and salt of ammonia or 
ammoniacal salt. When ammonia forms salts with the acids contain- 
ing water, an atom of water enters into the composition of the salt 
which cannot be disengaged, without destroying the salt itself. ‘The 
hydrogen of this water is in the precise proportion necessary to form 
ammonium with the ammonia,(74) and the oxygen is the same in 
(73) The same considerations which induce the adoption of the Latin termination 
in the case of those oxides which are combinations of two definite compounds of 
oxygen with a base, for example, the ferrosoferric oxide, seem to me to bear upon 
this case. Thus we may say ammonico-ferroso sulphate, ferroso-ammonico cyanu- 
ret. The views given in the French, are perhaps those of the translator not of 
the author.— Trans. 
(74) On this subject, see note 36.— Trans. 
