Methorics of Coagulation Processes. XII.* The Influence of the Composition and the Properties of Solvent on the Coagulation of Negative Silver Halide Sols

The results of coagulation measurements on negative silver halide sols in statu nascendi in water- ethanol, water-acetone, water- dioxane, and water-glycine solutions are given. In the majority of cases a lowering of the dielectric constant of the coagulating medium causes a decrease of the coagulation values, but there are also cases in which the contrary behaviour has been observed. The results are interpreted on the basis of the present theories of the stability of lyophobic colloids