. Impact with a Liquid Surface Studied by the Aid of Instantaneous Photography. Paper II. lash/ and it is interesting to recall in this connection the argument of ProfessorPoYNTiNG in his paper on the Change of State : Solid—-Liquid { Phil. July,1881), that the rate of exchange of molecules across any surface will increase withthe pressure. ^ Since this was written Sir Wm. Egberts-Austen has most kindly examined for us specimens of themetal taken from the ^ burr of such an armour-plate splash, and reports that he finds no traces of lique-faction having occurred. It therefore appears that
. Impact with a Liquid Surface Studied by the Aid of Instantaneous Photography. Paper II. lash/ and it is interesting to recall in this connection the argument of ProfessorPoYNTiNG in his paper on the Change of State : Solid—-Liquid { Phil. July,1881), that the rate of exchange of molecules across any surface will increase withthe pressure. ^ Since this was written Sir Wm. Egberts-Austen has most kindly examined for us specimens of themetal taken from the ^ burr of such an armour-plate splash, and reports that he finds no traces of lique-faction having occurred. It therefore appears that, even in this extremely rapid deformatioUj we mayhave to attribute the plasticity and quasi-fluidity of the metal to the same slip along surfaces of cleavagewithin the crystals of the material, which Professor EwiNC4 and Mr. EoSENHAiNf have shown to takeplace when the deformation is much more slowly effected.—(Note, October 8, 1899.) t Roy. Soc. Proc., May 25, 1899, vol, 65 ; PhiL Trans, K,S.,^ Series A, vol 193, 1899, Wort king ton & Cole. Phil. Trans., A., Vol. 194, Plate 2.
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