The last of these compounds constitutes what is now known by the name of protoxide, or black oxide of iron.
The ore of manganese employed in these experiments was the black oxide, or deutoxide, of manganese, as it is now called.
A similar experiment was made by dissolving iron in nitric acid, and then urging the fire till the iron was freed from every foreign body, and obtained in the state of black oxide.
It is seldom employed in the metallic state, from the great difficulty of reducing its ores, but its oxide (black oxide) is largely employed in the arts.
Black oxide of iron, bole, and oil of turpentine, of each 1 dr.
Black oxide of manganese and hydrate of potassa are mixed, heated to redness in a crucible, and then triturated with an equal weight of pure white clay, and water, q.
In dry air it does not oxidise at common temperatures; but at a red heat it soon becomes covered with a scaly coating of black oxide, and at an intense white heat burns brilliantly with the production of the same substance.
Copper melts, and becomes covered with a coat of black oxide; sometimes spots of a rose tint remain on the cupel.
After the rolling, the sheets covered with a black oxide of copper, are plunged into a mother water of the alum works for a few minutes, then washed in clean water, and lastly, smeared with oil and scraped with a blunt knife.
Corrosive sublimate is formed by various processes, among which we may enumerate the following: Take five parts of sulphuric acid, four parts of mercury, four parts of muriate of soda, and one part of black oxide of manganese.
A mixture of four parts of common salt, one of black oxide of manganese, and two of sulphuric acid, or muriatic acid poured on manganese or red lead, will generate chlorine gas.
If green, or yellow, the colour is destroyed by the addition of black oxide of manganese; and hence that oxide is named glass makers' soap.
Black oxide of manganese colours glass purple; but if large quantities be used, it makes it perfectly black.
In making common window glass, ordinary sand, which does not contain any very large quantity of iron, may be used, the alkali employed being sulphate of soda, while the purifying material is either arsenic or black oxide of manganese.
The addition of a small quantity of black oxide of manganese is sometimes necessary to correct the slight tint imparted by iron, which seems to be always present in minute quantities, even in the purest samples of sand.
No covetous hand is allowed to pluck the marvelous vintage of Mary's Vineyard; which, after all, the mineralogist explains as simply calcium carbonate coated with the black oxide of iron.
The walls and domes of these chambers are coated with the black oxide of manganese, and the enormous rocks lie scattered in the wildest disorder.
Examination proves them to be so many crystals of black oxide of manganese.
Proceed in the same manner with a similar quantity ofblack oxide of manganese,--apply the heat of a lamp, and oxygen gas will be produced.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "black oxide" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
