The viscosities of eight organic glasses have been determined as a function of temperature over the viscosity range of approximately lo4 to 10l2 P. The compounds and absolute temperatures investigated are: 3-methylpentane, 94-77'; 2-methylpentane, 96-80'; 2-methylpentene-1, 102-88' ; 2-methyltetrahydrofuran, 107-92' ; n-propyl alcohol, 131-103' ; isopropylben~ene, 149-130' ; n-butylbenzene, 151-136' ; and di-n-butyl phthalate, 200-179'. Measurements above 106 P were made by the pressure extrusion method, and those at lower viscosities by the gravity flow method. Knowledge of these viscosities, together with earlier information on the rates of decay of trapped free radicals in some of the glasses, indicates that macroscopic viscosity is not a major factor in determining such rates.

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The mass spectrometric fragmentation of adamantane, adamantane-d6, diamantane, 1- and 2-adamantanol, and 3,5,7-trimethyl-1-adamantanol has been re-examined, and new data for diamantane and 3,5,7-trimethyl-1-adamantanol are presented in more detail. Metastable peak data have been used to support potential fragmentation pathways. Simple statistical considerations applied to peak intensity data seem to indicate that ionization occurs at the primary bridgehead in both adamantane and diamantane, and that loss of a primary hydrogen is favored over loss of a secondary hydrogen atom.

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