Von Zander, Deutsch Normal und "deutsch" Dadant

The development of our most common frame sizes. Or, why do our frame sizes have such odd numbers? From Dzierzon and his "standard size," through the further developments by von Berlepsch and the professionalization, including in marketing, by Dathe. The decisions of the "Cologne" beekeepers. The fundamental principles of von Berlepsch. Mehring's single-bee system. Including historically accurate replicas of the Gerstung hive – almost Dadant High. Up to Zander and the origins of the various Dadant sizes.