Danish physicist (1885–1962) who was awarded the 1922 Nobel Prize in Physics for his theory of atomic structure. ALS on a black-bordered 5.75 x 3.75 card, December 7, 1930. Bohr writes to Doctor Tobiesen. In full (translated): “On behalf of my siblings and myself I ask that you accept our heartfelt thanks for your beautiful and sympathetic words in connection with Mother’s death….” Accompanied by the original mailing envelope addressed in Bohr’s hand. In very fine condition. RRAuction COA.