In the first part some conditions under which a permutation preserves Buck’s measure density, are derived. In the second part is constructed a countable system of permutations which has the ergodic property on the system of Buck’s measurable sets.

中文翻译：

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请注意保留Buck的测量密度的排列

在第一部分中，得出了一些排列保留了Buck测度密度的条件。在第二部分中，构建了一个可数的排列系统，该系统在巴克的可测集系统上具有遍历属性。