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

Watercolor on off-white wove paper

Black ink over graphite on cream board

Graphite, red and blue ink on yellow lined wove notebook paper

Ink and graphite on paper

Black ink on cream wove paper

Graphite on thin off-white wove paper

Graphite on paper

Charcoal on blue wove paper

Graphite on paper

Turpentine wash with oil and oil crayon on cream laid paper

Charcoal on off-white laid paper

Graphite on paper