. Impact with a Liquid Surface Studied by the Aid of Instantaneous Photography. Paper II. OiNT IMPACT WITH A LIQUID SURFACE 199 Such a conclusion, if established, would have practical importance in manymechanical processes. It could probably be tested by a microscopic examination^^ ofspecimens of the metal of the plate taken from the immediate neighbourhood of the^ splash/ 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 wil
. Impact with a Liquid Surface Studied by the Aid of Instantaneous Photography. Paper II. OiNT IMPACT WITH A LIQUID SURFACE 199 Such a conclusion, if established, would have practical importance in manymechanical processes. It could probably be tested by a microscopic examination^^ ofspecimens of the metal of the plate taken from the immediate neighbourhood of the^ splash/ 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 Profes
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