Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Refrigeration system: diagram

Graphite on off-white wove paper

Graphite on heavy weight, white card stock (Strathmore Bristol board)

Black ink on off-white wove paper

Graphite on cream wove paper

Colored pencil and graphite on white wove paper

Graphite on paper

Watercolor and graphite on off-white wove paper

Black ink on cream wove paper

Watercolor and white gouache over graphite on heavy off-white wove paper

Transparent watercolor, colored pencil, and crayon on white wove paper

Graphite with stylus and extensive stumping on ivory wove paper

Graphite on paper