Abstract
AT intervals during the past year I have tried a good many experiments in the hope of throwing further light upon the origin of these figures, especially those due to the passage of a small blow-pipe flame, or of hot sulphuric acid, across the surface of a glass plate on which, before treatment, the breath deposits evenly. The even deposit consists of a multitude of small lenses easily seen with a hand magnifier. In the track of the flame or sulphuric acid the lenses are larger, often passing into flat masses which, on evaporation, show the usual colours of thin plates. When the glass is seen against a dark ground, and is so held that regularly reflected light does not reach the eye, the general surface shows bright, while the track of the flame or acid is by comparison dark or black. It will be convenient thus to speak of the deposit as bright or dark— descriptive words implying no doubtful hypothesis. The question is what difference in the glass surface determines the two kinds of deposit.
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RAYLEIGH Breath Figures. . Nature 90, 436–438 (1912). https://doi.org/10.1038/090436c0
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DOI: https://doi.org/10.1038/090436c0