The London, Edinburgh and Dublin philosophical magazine and journal of science . xidizahle Variety of Nitrogen. 415 that an insufficient time had been allowed for nitric oxide tobe oxidized to nitrogen peroxide by atmospheric oxygenbefore the gas escaped from the trunk, unless the oxidationwere accelerated by ozonizing the air. That such an effectmay exist is shown by the fact that, whilst the proportion ofnitrogen peroxide present in the gas obtained from a series•of 17 spark-gaps amounted to about y0Vo wnen the gas waspassed rapidly through the trunk (Plate ), it was in-creased to about 3
The London, Edinburgh and Dublin philosophical magazine and journal of science . xidizahle Variety of Nitrogen. 415 that an insufficient time had been allowed for nitric oxide tobe oxidized to nitrogen peroxide by atmospheric oxygenbefore the gas escaped from the trunk, unless the oxidationwere accelerated by ozonizing the air. That such an effectmay exist is shown by the fact that, whilst the proportion ofnitrogen peroxide present in the gas obtained from a series•of 17 spark-gaps amounted to about y0Vo wnen the gas waspassed rapidly through the trunk (Plate ), it was in-creased to about 3 o^o (Plate XI. d) when the velocity wasreduced to \ , by blowing off most of the gas, in orderto allow ample time for the gas in the trunk to this explanation is not sufficient to account for the whole•of the observations, since even under the very favourableconditions of the low-velocity experiments 17 spark-gapswere required to produce a yield of nitrogen peroxide onlyone-third greater than that obtained from 6 spark-gaps withthe help of ozone. Fie. Apparatus for preparing Standard Mixtures of Nitric Oxide and Air. The efficiency of the ozonizer must evidently be attributedto its ability to oxidize to nitrogen peroxide some substancewhich cannot be so oxidized by air. This oxidizable sub-stance can scarcely be other than a variety of nitrogen itself,produced by the spark-discharge in much the same way thatozone is produced by the silent discharge. The most efficientway of oxidizing it is to produce it in an atmosphere alreadycharged with ozone (Plate XI. c). A rather less efficientmethod is to pass the air in which it is produced directly 416 Notices respecting Neiu Books, into an ozonizer (Plate XT. b). Less efficient still is thearrangement whereby the oxidizable nitrogen is mixed withozonized air in a mixing chamber a few feet away from thedischarge apparatus (Plate XI. a). The slight, but clearlymarked gradation in the first three exposures of Pl
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
