niI. n4. BREUER
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that only 4.8 X lop3equivalent of water/g. of hair is firmly bound to hair (Fig. 6) and that this hydration water is replaced by phenolic compounds in a molar proportion of 1 : l in the case of most of the phenols, and 2 : 1 in the case of resorcinol, l5 also that no preferential hydration on other sites occurs or, in other words, the rest of the water adsorbed by hair contains solutes (phenolic coliipounds) in the same ProPortioll as in the external so]ution, This water can, therefore, be regarded only as included solution.
The Binding of Phenols by Hair.
11.
Acknowledgments. The author wishes to thank Dr. A. D. Jenkins for many valuable suggestions and discussions, Mr. G. E. Jones for his skillful technical assistance, Dr. E. Graminski for permission to refer to his results, and the Management of Gillette Industries Ltd. for permission to publish this paper. (15) The displacement of water, in these ratios, was also demonstrated directly by Dr.
