Complex sentence: He collected many mineralogical specimens on scientific excursions in Saxony and Thuringia, continued by travel to the Austrian Alps (including the Salzkammergut), during which time, he made the acquaintance of Friedrich Mohs and Karl von Moll.
Split into simpler sentences: He collected many mineralogical specimens on scientific excursions in Saxony and Thuringia, continued by travel to the Austrian Alps (including the Salzkammergut). During his journeys he made the acquaintance of Friedrich Mohs and Karl von Moll.