18th-19th century
25.4 x 35.8 cm (10 x 14 1/8 in.)
Graphite on white prepared paper
20th centuryAmericanCharcoal and black ink on cream laid paper
20th centuryAmericanGraphite on paper
20th centuryGermanInk on paper
20th centuryAmericanGraphite and printed black ink on cream colored paper (verso: mimeographed Biology 21 worksheet)
20th centuryAmericanBlack crayon on paper
20th centuryGerman?Colored marker on paper
21st centuryGermanOlive, gray and orange crayon on paper
20th centuryGermanColored marker on paper
20th centuryGermanGraphite on paper
20th centuryGermanGraphite and red pencil on paper
20th centuryGermanBrown ink, brown and gray wash, graphite and scratchwork on cream wove paper
19th centuryAmerican