Abstract
The Debye-Sears method for measuring ultrasonic absorption is used for various organic liquids at room temperature and at frequencies of 3 to 15 mc/sec. The effect of molecular symmetry on absorption is studied for the pairs benzene, toluene; paraxylene, orthoxylene; and cyclohexane, methyl cyclohexane. The effect of double versus single bond is given for tetrachlorethane versus tetrachloroethylene. The effect of viscosity on absorption is shown to be almost negligible for solutions of polystyrene in either toluene or benzene. Finally, a possible explanation along relaxational lines is suggested.
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