Metallic powder of iron and nickel, or even oxides of these metals, prepared in the ordinary way, are not chemically active in a sufficient degree to work in a battery. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
In the production of metallic glazes, the oxides generally are employed. 威廉·亨利·杜利特.世纪发明.
By analysis it was learned what different metallic oxides should be employed to produce different colours. 威廉·亨利·杜利特.世纪发明.
The process of manufacture of rubies is carried on with the oxyhydrogen blow-pipe, to whose intense heat the powdered alumina with its coloring oxides is subjected. 佚名.神奇的知识之书.
Edison found that comparatively little was known by manufacturing chemists about nickel and iron oxides of the high grade and purity he required. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.