Experiment 47. If a portion of black wadd, an ore of manganese found in Derbyshire, England, be brought in contact with linseed oil; the oil will take fire, producing sometimes slight detonations.
Experiment 48. Take a portion of the brown oxide of tungsten, formed by transmitting hydrogen gas over tungstic acid, in an ignited glass tube; mix it with chlorate of potassa, and strike the mixture with a hammer: a loud detonation will ensue; or,
Experiment 49. Heat some of the brown oxide in the air. It will take fire, and burn like tinder, passing to the state of the yellow oxide, or tungstic acid.
Experiment 50. If one measure of oxygen gas, and two measures of hydrogen gas be mixed in the explosive eudiometer, and the electric spark passed through them, a detonation will ensue, and a complete condensation take place.
Experiment 51. When equal volumes of protoxide of azote, or gaseous oxide of azote, (called also nitrous oxide), and hydrogen gas, are treated in the same manner, the mixture will explode, leaving a residuum, consisting of azotic gas.
Experiment 52. If two measures of carbonic oxide or gaseous oxide of carbon, and one measure of oxygen, be submitted to the action of the electric spark, a detonation will ensue, and the carbonic oxide will be changed into carbonic acid.
Experiment 53. If one measure of carburetted hydrogen gas, either the heavy or light carburetted hydrogen, called also the hydroguret and bi-hydroguret of carbon, (the former being sometimes called olefiant gas), be mixed with two or three measures of oxygen gas, and the electric spark transmitted through them; a detonation will ensue, forming water and carbonic acid.
Experiment 54. If one measure of cyanogen, (carburet of azote), be mixed with two and a half measures of oxygen gas, and treated with the electric spark, the mixed gases will explode very loudly. The cyanogen burns, in this case, with a blue flame; although it is usually of a purple colour. The products of combustion are carbonic acid and azote. (See [Experiment 42.])
Experiment 55. If one measure of arsenuretted hydrogen gas, (obtained from an alloy of three parts of tin and one of arsenic, by treating it with muriatic acid), and two measures of oxygen gas are mixed together, and the electric spark is passed through the mixture; a detonation will ensue, and water and arsenious acid be formed.
Experiment 56. If potassium be made to act upon a compound of chlorine and sulphur, called chloride of sulphur, an explosion will immediately ensue; but,