| In what respects does aluminium oxide differ from calcium oxide in properties? |
| The liquors are previously mixed with a little milk of lime, which frees them from ferric oxide, alumina, and silica. |
| It is composed of silica, alumina, carbonate of lime, magnesia and oxide of iron. |
| The metallic oxide combines with this excess of acid anhydride, forming a mixed salt of metaboric acid. |
| Earlier in this chapter I said that the slag, or aluminum oxide, from the thermit process was an almost useless product. |
| It is virtually a compound of the two oxides, aluminum oxide and magnesium oxide. |
