On the Nature of Foam. IV. Phase Inversion and Foaming of Emulsion Consisting of Acetic Acid, Ethyl Ether, and Water

(1) It has been discovered, that there is certain heterogeneous system consisting of acetic acid, ethyl ether and water, which behaves both foamy and non foamy, according to the different modes of shaking. This behaviour in foam formation is due to the difference in the type of emulsions produced. (2) Three modes of shaking were noted and their influences upon the type of emulsion have been discussed. (3) The heterogeneous region of this system is divided into three parts, according to the type of emulsion produced by shaking, namely, oil-in-water region, water-in-oil region and phase inversion zone. In phase inversion zone, both types of emulsions are possible to be produced by different modes of shaking. Observations and discussions were made upon these emulsions.

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