GAZEOUS OXID OF NITROGEN.

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to 60 . On agitating this fluid in contact with water no absorp-tion will take place. On admitting nitrous gas a diminutionensues.

Rationale. ..It appears from this experiment that when asmall quantity of phosphorated hidrogen gas is inflamed withgazeous oxid of nitrogen, both the phosphorus and hidrogen areconsumed; whilst the super-abundant gazeous oxid, is convertedinto nitrous acid, and atmospheric air, by the ignition; or a cer-tain quantity is partially decomposed into atmospheric air by thecombination of a portion of its oxigen with the combustible gas.

2. Twenty-five parts of gazeous oxid of nitrogen mingled with10 of phosphorated hidrogen gas, may likewise be inflamed.After the detonation white dense vapours become visible, andthe gas left occupies a space equal to 25. The residuary gas isnot absorbable by water; on admitting a solution of green sul-phate cf iron, or prussiate of potash, no blue or green precipi-tate is produced, but if 25 parts of nitrous gas are mingled withit, the result will be 50.

Rationale. ..From this experiment we learn that when phos-phorated hidrogen gas and gazeous oxid are to each other as 25to 10, they both disappear, whilst nitrogen is evolved, and waterand phosphoric acid produced. Reasoning concerning the com-position of gazeous oxid of nitrogen from this result, we shouldconclude that it was composed of about 38 oxigen and 02 ni-trogen.

3. Ten grain-measures of gazeous oxid, mingled with 20 ofphosphorated hidrogen gas cannot be inflamed.

4. Twenty-five of gazeous oxid of nitrogen with 20 of phos-phorated hidrogen gas inflame readily. The gas after detonationis likewise opaque, and fills a space equal to about 45. Theresidue is not miscible with water, no white fumes are producedby admitting oxigen gas.

Rationale. ..Here we are taught that the affinity of phospho-rus for the oxigen of gazeous oxid of nitrogen, is stronger than

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