Nobel Prize–winning German physicist (1858–1947) who pioneered the understanding of quantum theory. ALS in German, signed “As always, your uncle, Max Planck,” one page, 6 x 7, personal letterhead, December 22, 1937. Letter to his nephew, addressed “Dear Ludwig.” in full (translated): “Many thanks for your letter dated 19th of this month, as well as for the genealogical table you had en closed. I am returning herewith the table to you. In addition to the already verbally given information, I was able to glean valuable supplemental data to be incorporated in my own genealogical table. We were very pleased getting to know you and happy for the opportunity to refresh our relationship. Your kind wishes for a Merry Christmas are returned most heartfelt. Please also give our kind regards to your dear parents.” Folds, creases, some wrinkles, and uniform toning, otherwise fine condition. An interesting letter in the fact that Planck is assembling a family history as the Nazi’s were in power at the time, and at one point investigated Planck's ancestry. RRAuction COA.
