Abstract
Abstract We consider the separation of mixed phases in cryoscopic investigations of colloidal systems and of rubber mixtures in particular as a dangerous source of error. Therefore we place no importance on the great variations in the depressions which occur with sol-rubber in benzene. The menthol values vary less, but nevertheless more than usual. The depressions of camphor fusions proceeded strictly stoichiometrically and led to almost the same value (about 1200) as the cryoscopic menthol measurements. In both the latter instances the composition (rubber content) of the crystallized phase has not yet been studied, since the experimental difficulties involved in the separation of the crystals from the viscous fusion liquid have not yet been overcome.
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