256 Chemical Nomenclature of Berzelius. 
Chromic oxide.* __ Protoxide of chromium. 
Suschromic oxide.(17) 
Chromic acid. 
Molybdous oxide. 
Molybdic oxide. Protoxide of molybdenum. ~ 
Molybdic acid. 
Tungstic oxide. 
Tungstic acid. 
Antimonic oxide (Hypantimonious 
acid.) Protoxide of antimony. 
Antimonious acid. Deutoxide of antimony. 
Antimonic acid. Peroxide of antimony. 
Telluric acid, (Telluric oxide.) Oxide of tellurium. 
Tantalic oxide. Oxide of tantalum or columbium. 
Tantalic acid. | 
Titanic oxide. Protoxide of titanium. 
Titanic acid. Peroxide of titanium. 
Aurous oxide. Protoxide of gold. 
Auric oxide. Peroxide of gold. 
Platinous oxide. Protoxide of platinum. 
Platinic oxide. Peroxide of platinum. 
Tridious oxide.(18) 
Susiridious oxide. 
Tridic oxide. 
Susiridic oxide. 
Osmious oxide.(19) 
* Although the green oxide of chromium is the lowest combination now known 
of chromium with oxygen, I call it chromic oxide, because it contains three atoms of 
oxygen, and is isomorphous with aluminic oxide (alumina), manganic oxide and fer- 
ric oxide.— Berzelius. 
(17) Suschromic oxide. The brown oxide, generally supposed to be a mixture of 
the oxide and acid of chromium. Berzelius does not admit the experiments of Maus 
to be conclusive upon this point.— Zrans. 
(18) These four oxides of iridium are obtained by decomposing the corresponding 
chlorides by an alkali. The quantities of oxygen which they severally contain are 
in the ratio of 1, 14, 2 and 3.— Trans. ’ 
(19) Berzelius considers as proved the existence of four oxides of osmium, and as 
probable of one intermediate between the third and fourth. The volatile oxide or 
osmic acid is the only one of these compounds to be obtained, by directly combining 
osmium with oxygen; the others are obtained from the corresponding chlorides. 
The proportions of oxygen in the osmious, susosmious and osmic oxides, and in os- 
mic acid, are as 1,14, 2 and 4. The proportion of 3 of oxygen, which is wanting, 
is placed in the table as susosmic oxide; this oxide has a corresponding chloride.— 
Trans. 
