La Science

Oiled black chalk heightened with white on tinted tan antique laid paper

Black and white chalk on brown antique laid paper

Brown ink over graphite (?) on off-white antique laid paper

Brown wash over black chalk on off-white antique laid paper

Brown ink and white and pink gouache over black chalk on cream antique laid paper prepared with orange wash

Brown ink and black chalk on dark cream antique laid paper; verso: brown ink

Black and red chalk and gray wash on cream antique laid paper; verso: black chalk and graphite, attached to cream antique laid decorative mount

Brown ink with two colors of brown wash over black chalk, heightened with white gouache, on blue antique laid paper; verso: brown ink and black chalk, drum-mounted to a wove decorated paper mount

Black chalk on off-white antique laid paper; verso: red chalk

Brown ink and brown wash on cream antique laid paper

Brown ink, red wash over red chalk on off-white antique laid paper

Black and white chalk, stumped, on blue antique laid paper, framing lines in brown ink