If any one is interested in Langstroths teachings, then here is an audio version of his book.
https://librivox.org/langstroth-on-the-hive-and-the-honey-bee-by-l-l-langstroth/
https://librivox.org/langstroth-on-the-hive-and-the-honey-bee-by-l-l-langstroth/
Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted - Ralph Waldo Emerson