. Impact with a Liquid Surface Studied by the Aid of Instantaneous Photography. Paper II. <\ ••,». We observe that in figs. 1 and 2 (same Series XX., Plate 3) the continuous film orshell of liquid no longer reaches the outermost droplets that once have been at itsedge. It must evidently have been pulled in by its own surface tension, which ofcourse will cease to exercise any inward pull on a drop that has once separated. The influence of dust, thus incontestably proved, seems to afford a satisfactoryexplanation of— (1) The effect of a flame. (2) The effect of heating. (3) The variable and u
. Impact with a Liquid Surface Studied by the Aid of Instantaneous Photography. Paper II. <\ ••,». We observe that in figs. 1 and 2 (same Series XX., Plate 3) the continuous film orshell of liquid no longer reaches the outermost droplets that once have been at itsedge. It must evidently have been pulled in by its own surface tension, which ofcourse will cease to exercise any inward pull on a drop that has once separated. The influence of dust, thus incontestably proved, seems to afford a satisfactoryexplanation of— (1) The effect of a flame. (2) The effect of heating. (3) The variable and uncertain effects of electrification. For (1) we may suppose that the flame burns off minute particles of dust; (2) weknow from Aitkens experiments that dust from the atmosphere will not settle on asurface hotter than the air; (3) an electrified sphere descending through the airwould attract dust to its surface unless it happened^ as well might happen, that theair round about it, with its contained dust, had become itself similarly chargedthrough the working of the electrical machine. At the sam
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