  Translation of Ludwig Boltzmann's paper "\"Uber die Eigenschaften
monozyklischer und anderer damit verwandter Systeme" Crelles Journal 98. S.
68-94. 1884 u. 1885 from German into English. In this foundational paper
Boltzmann introduced two key concepts into statistical mechanics. The first is
the statistical ensemble. This includes what are now known as the
micro-canonical and canonical ensembles, albeit under different names. The
second is the concept of ergodic systems, or ergodicity, which has played an
important if contentious part in the foundations of statistical mechanics.
