Complex sentence: L. L. Langstroth knew all about Dzierzon's discoveries, before 1 Nov 1851 he read the "Theorie und Praxis,..." publicized by Jan Dzierzon in 1848.
Split into simpler sentences: L. L. Langstroth knew all about Dzierzon's discoveries. Before 1 Nov 1851 he read the "Theorie und Praxis,..." publicized by Jan Dzierzon in 1848.