1932
50 x 61 cm (19 11/16 x 24 in.)
[Curt Valentin, Buchholz Gallery, New York, New York (by 1950-], sold; to Mr. and Mrs. Alfred Jaretzki, Jr., New York, New York, gift; to Fogg Art Museum, 1963.
Invisible physical energy on white wove paper. [The actual drawing is a blank sheet of wove paper placed into a handmade glassine envelope which is itself placed into a handmade white wove paper envelope which is then placed into a handmade brown card folder. There is also another handmade glassine envelope which contains a white printed card. The text on the latter reads: "A Couple of Wet Rocks/(invisible drawing/energy)"]
20th centurySwissGraphite on cream paper
20th centurySwissOil pastel on white wove paper
20th centurySwissBlack ink on cream paper mounted to board
20th centurySwissWhite ink on gray wove paper
20th centurySwissCrayon on paper
20th centurySwissWhite ink on gray wove paper
20th centurySwissGraphite on mat board
20th centurySwissBlack ink, watercolor, and gouache on cream paper
19th-20th centurySwissBlack crayon on white wove paper
20th centurySwissGraphite on paper mounted to board
20th centurySwissWatercolor
20th centurySwiss