Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Radiator schedule and piping diagram: isometric

Graphite on paper

Graphite on paper

Gouache, graphite and watercolor on off-white Japanese paper

Incised line and Aquarelle on white wove paper

Ink and graphite on paper

Black chalk, charcoal, and graphite on off-white modern laid paper, cut at center

Black and red conté crayon on ivory tracing paper

Black ink on off-white wove paper

Ink on paper

Graphite and dyes (yellow and red inks) on 100 lb. coated stock paper

Graphite on paper

Black ink on cream wove paper