1Q4, PROOFS OF THE PROPERTIES OF OXIGEN GAS.

If the taper be blown out and let down into the vessel of gaswhile the snuff remains red-hot, it instantly rekindles with aslight explosion, and burns vividly.

Experiment II.

A piece of the bark of charcoal fastened to a copper wireignited, and then immersed in the gas, throws out brilliantsparks.

Experiment III.

A mixture of nitrate of strontia and charcoal powder, pre-viously ignited, burns with a rose-coloured flame.

Experiment IV.

A mixture of one part of boracic acid, and three of charcoal,burns green.

Experiment V.

One part of nitrate of barytes and four of charcoal powderburn with a yellow flame.

Experiment VI.

Equal parts of nitrate of lime and charcoal powder burnorange-red.

Those who are desirous of multiplying experiments of thiskind, may present to oxigen gas under similar conditions, avariety of other combustible substances. The phenomena attend-ing the combustion of many of them are extremely vivid andbeautiful; for instance, cotton dipt in oil of turpentine, or ar-dent spirit, resin, camphor, elastic-gum, kc.