Abstract
1. Experiments are described in which periodic coagulation is produced in As2S3 and Fe(OH)3 sols by colloids having opposite charges. 2. The effect of different lyophilic structures is studied. The function of the jellies is to offer their solvated shells or lyosphere for the protection of the hydrophobic particles of the sols. 3. The results can be explained by the coagulation theory as proposed by the author. 4. These and other results described in the various publications show that the formation ofLiesegang rings is a special case of periodic coagulation wherein the coagulants are electrolytes.
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