Sex-Determination and Sex-Differentiation in Mammals.

only when the compound capable of tautomerization is in the liquid phase, or in solution. And that is just the case with the free radicals under consideration. 6. The two radicals, a-naphthyl-diphenylmethyl and a-naphthylxanthyl, were found to give a molecular weight less than that calculated for the monomolecular phase. Schlenk and Renning's" results show that a-naphthyl-biphenyl-phenylmethyl exhibits the same unusual behavior. We' have good reasons to believe that our results are not due to experimental errors, and we took pains to verify them repeatedly. The cause of this unexpected result may possibly lie in a still further dissociation of the triarylmethyl itself, R R' R" C=, RR'C+R".