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Spermophilus ludovicianus, Prairie Dog-Prairie Marmot Squirrel. Natural Size. 1. Male, 2. Female, 3. Young.

Spermophilus ludovicianus, Prairie Dog-Prairie Marmot Squirrel. Natural Size. 1. Male, 2. Female, 3. Young. (1845-1848)

John Woodhouse Audubon (American, 1812-1862)
Spermophilus macrourus, Large-tailed Spermophile. Male. Natural size.

Spermophilus macrourus, Large-tailed Spermophile. Male. Natural size. (1845-1848)

John Woodhouse Audubon (American, 1812-1862)
Spermophilus Mexicanus, Mexican Marmot Squirrel. Male. Natural size.

Spermophilus Mexicanus, Mexican Marmot Squirrel. Male. Natural size. (1845-1848)

John Woodhouse Audubon (American, 1812-1862)
Spermophilus Parryi, Parry’s Marmot Squirrel. Natural size.

Spermophilus Parryi, Parry’s Marmot Squirrel. Natural size. (1845-1848)

John Woodhouse Audubon (American, 1812-1862)
Spermophilus Richardsonii, Richardson’s Spermophile. Natural size.

Spermophilus Richardsonii, Richardson’s Spermophile. Natural size. (1845-1848)

John Woodhouse Audubon (American, 1812-1862)
Spermophilus spilosoma, California Marmot Squirrel. Natural size.

Spermophilus spilosoma, California Marmot Squirrel. Natural size. (1845-1848)

John Woodhouse Audubon (American, 1812-1862)
Spermophilus tridecemlineatus, Leopard Spermophile. Natural size. Male and female.

Spermophilus tridecemlineatus, Leopard Spermophile. Natural size. Male and female. (1845-1848)

John Woodhouse Audubon (American, 1812-1862)
Sphagolobus atratus

Sphagolobus atratus (1882)

Daniel Giraud Elliot (American, 1835 – 1915)
Sphinx

Sphinx (1900 - 1925)

Albert Sterner (American, 1863 – 1946)
Sphinx Caterpillar, study for book Concealing Coloration in the Animal Kingdom

Sphinx Caterpillar, study for book Concealing Coloration in the Animal Kingdom

Abbott Handerson Thayer (American, 1849-1921)
Sphinx Caterpillar, study for book Concealing Coloration in the Animal Kingdom

Sphinx Caterpillar, study for book Concealing Coloration in the Animal Kingdom

Abbott Handerson Thayer (American, 1849-1921)
Sphinx, Thames, London

Sphinx, Thames, London

Bertha Jaques (American, 1863 – 1941)
Sphygmomanometers

Sphygmomanometers

National Institutes of Health (American, 1887-)
Spice Box

Spice Box (c. 1927)

Edward L. Loper (American, 1916 – 2011)
Spice Grinder

Spice Grinder (c. 1937)

Francis Law Durand (American, active c. 1935)
Spicebush (Calycanthus occidentalis)

Spicebush (Calycanthus occidentalis) (early 1930s)

Mary Vaux Walcott (American, 1860-1940)
Spider Lake, Wisconsin

Spider Lake, Wisconsin

Bertha Jaques (American, 1863 – 1941)
Spider Lily (Hymenocallis rotata)

Spider Lily (Hymenocallis rotata) (1919)

Mary Vaux Walcott (American, 1860-1940)
Spiderlily. Hymenocallis rotata

Spiderlily. Hymenocallis rotata (1925)

Mary Vaux Walcott (American, 1860-1940)
Spillway

Spillway (1936)

Arnold Wiltz (American, 1889-1937)
Spillway, Ashokan Dam

Spillway, Ashokan Dam (1934)

Arnold Wiltz (American, 1889-1937)
Spilt Milk

Spilt Milk

Frederick Lowenheim (American, 1870-1929)
Spinach, Salsify-Oyster Plant

Spinach, Salsify-Oyster Plant (1921)

Genesee Valley Lithograph Co. (American, 19th Century/20th Century)
Spinning By Firelight–The Boyhood of George Washington Gray

Spinning By Firelight–The Boyhood of George Washington Gray (1894)

Henry Ossawa Tanner (American, 1859-1937)
Spiral Iron Candle Holder

Spiral Iron Candle Holder (c. 1941)

Chris Makrenos (American, 20th Century)
Spirit in the Garden

Spirit in the Garden

Robert Reid (American, 1862-1929)
Spirit Lamp with Teapot

Spirit Lamp with Teapot (1938)

J. Howard Iams (American, 20th Century)
Spirit of ’76

Spirit of ’76 (1845)

Tompkins Harrison Matteson (American, 1813-1884)
Spirit of the Sphinx

Spirit of the Sphinx

Henry Bacon (American, 1839-1912)
Spirituals

Spirituals (1935 - 1943)

Lillian Richter Reynolds (American, 1916-)