Valentines Day, 1855
British Library
Johann Carl Friedrich Gauss, German #2
Science Source
Johann Carl Friedrich Gauss, German #5
Science Source
The Mccoys, Conjoined Twins, 1855
Science Source
Bunsen-kirchhoff Spectroscopic
Science Source
Johann Carl Friedrich Gauss, German
Omikron
Sharps Breechloading Rifle
Smithsonian Institution
Lucy Stone, American Abolitionist #3
Science Source
Alexander Von Humboldt, Prussian #7
Science Source
Percival Lowell, American Astronomer #3
Science Source
Mother Goose In Hieroglyphics, 1855
Science Source
Mount Fuji, 36th Station, 1855
Science Source
Mount Fuji, Kawasaki Station, 1855
Science Source
Mount Fuji, 36th Station, 1855 #1
Science Source
Mother Goose In Hieroglyphics, 1855
Photo Researchers
Mount Fuji, Totsuka Station, 1855
Science Source
Mount Fuji, Yoshiwara Station, 1855
Science Source
Mount Fuji, Kawasaki Station, 1855 #1
Science Source
Mount Fuji, Totsuka Station, 1855 #1
Science Source
Mount Fuji, Yoshiwara Station, 1855 #1
Science Source
François Magendie, French Physiologist
Science Source
David Bruce, Scottish Microbiologist
Science Source
Johann Carl Friedrich Gauss, German
Science Source
Percival Lowell, American Astronomer #2
Science Source
Adolphe Wurtz, French Organic Chemist
Science Source
David Bruce, Scottish Microbiologist #1
Science Source
Victor Hugo, French Author
Photo Researchers
Victor Hugo, French Author #1
Photo Researchers
Victor Hugo, French Author #2
Photo Researchers
François Magendie, French Physiologist #3
Science Source
Luther Emmett Holt, American
Science Source
Johann Carl Friedrich Gauss, German #4
Science Source
Victor Hugo, French Author #5
Photo Researchers
Extravasated Blood, Brain
Wellcome Images
Victor Hugo, French Author
British Library
Mount Fuji, Tone River, 1858
Science Source
Fukijawa, 38th Station On Tokaido Road
Science Source
Mount Fuji, Ryogoku, 1858 #1
Science Source
Johann Carl Friedrich Gauss, German #1
Science Source
Percival Lowell, American Astronomer #1
Science Source
François Magendie, French Physiologist #1
Science Source
François Magendie, French Physiologist #2
Science Source
Johann Carl Friedrich Gauss, German #1
Omikron
Johann Carl Friedrich Gauss, German #3
Science Source
Mary Britton, African-american Physician
Science Source
Young Victor Hugo, French Author
Photo Researchers
Victor Hugo, French Author #3
Photo Researchers
Adolf Eugen Fick, German Physiologist
Science Source
François Magendie, French Physiologist #4
Science Source
François Magendie, French Physiologist #5
Science Source
Victor Hugo, French Author #6
Photo Researchers
Unusual Cerebral Hemorrhage
Wellcome Images
Mount Fuji, Ryogoku, 1858
Science Source
Mount Fuji, Sukiya Bridge, 1858
Science Source
Mount Fuji, Sukiya Bridge, 1858 #1
Science Source
Percival Lowell, American Astronomer
Science Source
Victor Hugo, French Author #4
Photo Researchers
Mount Fuji, Tone River, 1858 #1
Science Source
Lung With Tubercular Disease, 1855
Wellcome Images
Seasons Greetings, Happy Holidays, 1855
Science Source