1973
National Gallery of Art, 1935
Patrons' Permanent Fund, 1969
National Gallery of Art, 1855
National Gallery of Art, 1515
National Gallery of Art, 1837
National Gallery of Art, 1952
National Gallery of Art, 1600
National Gallery of Art, 1726
National Gallery of Art, 1920
Bruce Fund, Ailsa Mellon, 1632
National Gallery of Art, 1936
National Gallery of Art, 1966
![Untitled, Second State (Ruler and Fork) [trial proof]](https://api.nga.gov/iiif/3b743e60-981b-4d51-ab86-ce15f6c00405/full/843,/0/default.jpg)
![Light Bulb [proof]](https://api.nga.gov/iiif/ff41a0ec-a289-4d10-a78c-a0db4f4d691b/full/843,/0/default.jpg)