Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Layout of equipment in air conditioning room: plan and elevation

Watercolor over graphite on heavy off-white wove paper

Black ink on off-white wove paper

Graphite on off-white wove paper

Graphite on white wove translucent paper

Pastel on cardboard

Crayon, opaque watercolor and graphite on white thick rough wove paper

Brown ink on white wove paper

Watercolor over graphite on off-white wove paper

Graphite on paper

Monotype on off-white wove paper; verso: watercolor, oil pastel(?), and graphite

Black chalk on off-white laid paper

Black ink over black crayon and graphite with scratchwork on white scratchboard