Curator, Ann Temkin: These are these individual units, 21 of them, that are just four inches tall that are almost like little trays and sit directly on the floor the lowest work in the exhibition.
These are works that are set according to Judd's specifications, thirteen and a half inches apart from each other. For all of Judd's work, it is specified by him what those gaps between different units need to be. And that isn't because he was being fussy or a control freak. That was really because the space in between the units is as important as a component of the sculpture as the solid part.
And Judd often spoke about that he gave as much thought to the positioning of a piece as to the making of it. Sculptures really are beings in a place. And the being that is a sculpture depends for its life on the space in which it's being seen.