Found native as "Braumite," and readily formed by exposing manganous hydrate to the action of air, and drying, or by gently igniting the peroxide brown or black powder decomposed by heat.
It is a black powder, insoluble in water, soluble in alkalies, and precipitated by acids.
A greyish-black powder, attracted by the magnet, and exhibiting metallic streaks when rubbed with firm pressure in a mortar.
A very dark grey or black powder, suffering decomposition by exposure to light and air, becoming olive coloured, from a portion being resolved into metallic mercury and binoxide.
These shells are fitted with time-fuses which fire the charge of black powder at the desired interval after the discharge of the shell from the gun.
This fuse ignites a charge of black powder in the nose of the shell and this explosion ejects the star-shell out of the rear of the steel casing.
Prepared in this way it is a soft, lustrous, very bulky, black powder.
By passing hydrosulphuric acid into a solution of a mercuric salt it is precipitated as a black powder, insoluble in water and acids.
Prepared in this way it forms a black powder; when melted it forms a tin-white metal which is less fusible and more malleable than wrought iron.
The ore in this process hardly changes weight, having gained in oxidizement nearly as much as it has lost in sulphur and arsenic; and if the roasting has been rightly managed, the ore is in a black powder, owing to the oxide of iron present.
When much bismuth is present, it may be easily parted by strong muriatic acid, which dissolves the tin, and leaves the bismuth in a black powder.
His guns sputtered red fire and bursts ofblack powder smoke.
Two streaks of red fire darted through the haze of black powder smoke as he fired both barrels into the brush.
A gust of wind blew away the cloud of black powder smoke, and the crowd stared.
The permissible explosives are one and one-fourth to one and three-fourths times as strong and are said, if properly used, to do twice the work of black powderin bringing down coal; hence only half the quantity need be used.
The time elapsing after firing before the miner returns to the working face or fires another shot should not be less for permissible explosives than for black powder.
Mercury combines readily with sulphur by trituration, and with it forms a black powder called Ethiops mineral.
When mercury is united with lead or other metals, it is rendered less brilliant and less fluid; but agitation in pure air converts the impure metal into a calx, together with much of the mercury, in the form of a black powder.
I ventured to suggest that it might be dangerous to shoot such a heavy charge of nitro powder out of a very light gun proofed only for black powder.
It presents the form of a black powder, and has some metallic lustre, is brittle, and fuses at a high temperature to a vitreous looking mass.
In the metallic state, it presents the appearance of a black powder, which, when compressed, exhibits the metallic lustre.
It is in the form of a black powder, and does not combine with other substances, unless it is reduced to the protoxide.
When prepared by chemical process, it is in the form of a black powder.
A gallery charge is furnished in this shell consisting of 4 grains of black powder and a spherical or "round" bullet weighing 47 grains.
These are primed with a fulminate of mercury mixture around the outer edge of the rim, or base of the shell, and are generally loaded with Lesmok, semi-smokeless, or black powder.
Nearly all the cartridges referred to in this chapter were originally designed for black powder.
This does not increase the accuracy in black powder ammunition, but it is necessary and advantageous in all smokeless ammunition including gallery charges, in order to confine the powder and produce uniform results.
The question of black powder, while an important one, did not present many difficulties excepting one, the necessary supply of potassium nitrate.
Now if this same charge of powder be collected and reloaded into a new cartridge case and well confined behind wads and a charge of shot, as above explained, it will all burn, giving the same results as black powder.
The report of a gun using smokeless powder is a sound of much higher pitch than when black powder is used, and consequently cannot be heard at so great a distance as the lower notes given by black powder.
Smokeless powder is not ignited in the same manner as black powder.
Noble points out that the erosion caused is of a totally different kind to that of black powder.
Colonel Barker says that the effect of heat upon cordite is not greater as regards its shooting qualities than upon black powder, and in speaking of the effect that cordite has upon the guns in which it is used (R.
The pressures given by cordite compared with those given by black powderin the 6-inch gun will be seen upon reference to Fig.
The erosion also extends over a shorter length of surface, and in small arms it is said to be no greater than in the case of black powder.
Black powder should be applied to white or light-colored surfaces.
On clear transparent glass, either gray or black powder may be used, it being necessary only to use a contrasting black or white background when photographing.
This combination takes the form of a black powder, which has procured it the name of AEthiops Mineral.
Then he adds half a pound of charcoal-dust, and evaporates the matter, kept continually stirring, till the whole be brought to a black powder.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "black powder" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
