Seismologist, most famous as the creator of the Richter Magnitude Scale which quantifies the size of earthquakes. Ink signature, “Charles F. Richter, Oct. 9, 1980,” on an off-white 4 x 3 bookplate; and a ballpoint signature, “Charles F. Richter, April 26, 1982,” on an off-white partial paper napkin. In fine condition, with several folds to napkin, one through a letter of signature. RRAuction COA.
