1940
plate: 30 x 25.2 cm (11 13/16 x 9 15/16 in.)
Irwin D. Hoffman, gift to Harvard University. Department of Earth and Planetary Sciences, transferred 17 December 1999.
Etching on cream wove paper
20th centuryAmerican
Softground, engraving, mezzotint, etching, aquatint and drypoint
20th centuryAmerican
