286. The chain theory of the oxidation of phosphorus vapour. Part I. Comparison of the effect of hydrogen, deuterium, and helium on the lower explosion limit of phosphorus–oxygen mixtures. Part II. Displacement of the lower limit by ultra-violet light. Part III. Influence of ultra-violet light on the upper limit. Part IV. The stable oxidation reaction below the lower limit. Part V. The transformation of white into red phosphorus by means of ultra-violet light
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