Earthenware with slip

Colored pencil on paper

Pentelic Marble

Bronze

Igneous rock

Alabaster with traces of polychromy

Pen and ink, gray wash, stylus and compass marks, with traces of metalpoint on parchment attached to a later wooden spool

Black and white chalk on blue laid paper

Red chalk on laid paper with 18th-century laid paper mount ruled with ink, wash and metal foil

Pen and brown ink and wash and red chalk over black chalk on laid paper

Pen and brown ink, brown wash heightened with white on laid paper

Black chalk and gray wash on laid paper

Pen, brush, and watercolor, with touches of gold on vellum

Black and red chalk on laid paper

Black chalk heightened with white on pink paper

Charcoal on wove paper, lined with mulberry paper

Ink on paperboard

Graphite and watercolor on laid paper

Black chalk on wove paper

Pencil on wove paper

Drawing on paper

Pastel and chalk on wove paper

Watercolor over graphite on wove paper

Watercolor and oil paint over black chalk on wove paper

Watercolor over possibly graphite heightened with scratching out and stopping out on wove paper

Black chalk and watercolor over graphite on wove paper

Pen and brown ink with graphite on laid paper

Black chalk with white chalk and stumping on [once] blue wove paper

Graphite on paper

Watercolor

Watercolor

Oil on paperboard

Graphite on wove paper

Pencil drawing on wove paper

Graphite and charcoal, heightened with white chalk on laid paper

Graphite on paper

Lithograph

Wood

Chalk on wove paper

Wood, brass tacks, tin, and nails

Volcanic stone

Aquatint in color on Arches wove paper, edition 47/50

Charcoal on wove paper

Watercolor and ink on cream wove paper

Ink on wove paper

Bronze

Pastel on paper

Watercolor with graphite on wove paper

Watercolor over graphite on wove paper

Watercolor on wove paper

Oil and nails on wood, five pieces glued

Gouache on wove paper

Mixed media on wove paper

Oil on wood

Pastel on paper, laid on cardboard

Bronze

Ink and graphite on paper

Mixed media on wove paper

Sheet aluminum, rods, and wire

Watercolor, graphite and ink on paper

Watercolor and ink on paper

Steel

Ink on paper

Plexiglas, water and metal

Steel wire, wood base, and electric motor

Shallow wooden box, metal attachments, wooden pulleys, round rubber belt, and electric motor

Steel tube frame, steel wire, painted cardboard, and electric motor

Shallow wood box, wood pulleys, round rubber belt, wire and paper attachments, and electric motor

Wood panel, polychrome wood, metal, wooden pulleys, round rubber belt, and electric motor

Colored ink on wove paper

Mixed media on wove paper

Oil on canvas, mounted on wood

Round rubber belt, steel rods, painted sheet metal, wire wooden pulleys, two clothes pins, and electric motor

Enamel on paper

Enamel on wove paper

Bronze

Bronze

Ball-point pen on ivory wove paper, double sided

Charcoal on laid paper

Steel rods and wire, aluminum pulley, brass bell, round rubber belt, and electric motor

Iron

Ink on wove paper

Polyester and cloth

Sheet steel base, steel rods, fur pelts, horse hair, and electric motor

Welded steel, epoxy, canvas, fabric, saw blade, and wire

Ink and watercolor on paper

Structural steel-channel base, steel rod, small tricycle wheel without tire, round rubber belt, and electric motor

Ink and gouache on board

Oil and acrylic on carved plywood

Steel plate, iron and steel spoked wheels, slant line pulleys, rubber V-belt, and electric motor

Steel, steel pipe section, iron wheels, rubber V-belt, flat belt, and electric motor

Bronze on marble base

Painted wood

Canvas, wood, and polyurethane foam

Plexiglas

Plexiglas, light, water pump, and formica

Iron and stainless steel wire, nylon, and lead weights

Painted wood

Acrylic, Plexiglas, paint, and light

Clay and enamel