German chemist (1872–1942) who won the 1915 Nobel Prize for Chemistry for his research related to the structure of plant pigments, including chlorophyll. Short ALS in German, one page, 8.5 x 11, personal letterhead, August 7, 1928. Brief letter to Ernst Heimeran. “In accordance with your wishes, I sent you separately today a copy of the P[eter] v. Halm'schen etching.” In fine condition, with bisecting mailing folds, a few wrinkles, and two punch holes to left edge. RRAuction COA.
