Tools of off-and-on abstraction

“Bone Music #1” (1949) (pen, ink and watercolor), by Dorothy Dehner (1901-1994), at the Yale University Art Gallery, in its group show “Midcentury Abstraction: A Closer Look,’’ Feb. 25-June 26.

The gallery says:

"Eschewing the notion that there was a linear shift toward abstraction at midcentury, the exhibition showcases a group of artists who freely moved in and out of abstraction or blended their radical approaches with traditional subject matter, such as landscape, portraiture, or still life."