Pennsylvania Pavilion for World's Fair, New York, 1939: Hall of Progress, propeller: elevation and section (1/4" = 1'-0" )

Watercolor and white gouache on off-white wove paper

Graphite on paper

Graphite on paper

Graphite on buff wove paper

Colored pencil and metalpoint with incised lines on white wove paper

Graphite on off-white wove paper

Watercolor over graphite on off-white wove paper

Watercolor over graphite on heavy off-white wove paper

Watercolor and white gouache on buff card

Watercolor over graphite on off-white wove paper

Brown ink and wash over graphite on buff wove paper

Watercolor and gouache over graphite on off-white wove paper