Velocity of ultrasonic waves, as a function of temperature and concentration have been measured for four naphthalene halogen derivative solutions in supersaturated metastable regions, under conditions of continuous linear cooling and without stirring. The maximum undercooling $Delta@T$-max$/ was evaluated as a difference between saturation temperature and the temperature of first precipitation detected by the change of ultrasonic velocity. It was found that for all the solutions in their metastable regions, ultrasonic velocity linearly increases with decreasing temperature at given concentration and that the first-order equations relating ultrasonic velocity with solutions concentration can satisfactorily be used to describe the data.
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机译：在连续线性冷却的条件下，已经测量超声波的超声波的速度，作为温度和浓度的函数，在连续线性冷却的条件下，在不搅拌的情况下测量过饱和稳定性区域中的四个萘卤素衍生物溶液。最大过冷$ Delta @ T $ -max $ /被评估为饱和温度与通过超声波速度的变化检测到的第一降水量之间的差异。发现，对于它们的亚稳地区的所有溶液，超声速度随着给定浓度的降低而线性增加，并且可以令人满意地将超声速度与溶液浓度相关的一阶方程令人满意地用于描述数据。
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