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Portrait of the Grand Duchess Ekaterina Alekseyevna (Catherine the Great)
Portrait of the Grand Duchess Ekaterina Alekseyevna (the future Catherine the Great) around the time of her wedding, oil on canvas by Georg Christoph Grooth, 1745. Hermitage Museum, Saint Petersburg. Scanned by Mrlopez2681 from...
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Empress Catherine II of Russia
A portrait of Empress Catherine II of Russia, oil on canvas by Alexander Roslin, 1780s.
Kunsthistorisches Museum, Vienna.
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Portrait of Catherine II
Portrait of Catherine II, oil on canvas by Alexey Antropov, 18th century.
Art Gallery of Tver, Russia.
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Bluefly under Microscope
A pen and ink drawing by Robert Hooke (1635-1703) first published in his Micrographia in 1665. This page shows a bluefly seen under a microscope. (National Library of Wales)
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Frozen Structures under Microscope
A pen and ink drawing by Robert Hooke (1635-1703) and published in his Micrographia in 1665. This page shows frozen structures seen under a microscope. (National Library of Wales)
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Culpeper Microscope
A microscope with boxfoot made by George Adams in 1738. Based on a model designed by Edward Culpeper (1670-1737). The concave mirror at the base illuminated the specimen better than a flat mirror. (Science Museum, London)
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Microscope of van Leeuwenhoeck
A model of the microscope created by Antonie van Leeuwenhoek (1632-1723). Made by the Boerhaave Museum, Leiden, 1983. The microscope used a glass bead as a magnifier, giving a much greater magnification than other types of lenses available...
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Microscope of Louis Pasteur
The compound monocular microscope of Louis Pasteur (1822-1895). Made by Nachet et fils, 1861-70. (Science Museum, London)
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The Five Good Emperors of the Roman Empire (96 - 180 CE)
An infographic illustrating the succession of Roman rulers between 96 and 180 CE, known as the Five Good Emperors (a term unknown to the ancient Romans, coined by Nicolo Machiavelli in his 1531 manuscript Discourses on Livy and made widely...
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18th-Century Microscope
An early 18th-century microscope designed and made by John Marshall. It is a compound microscope, that is, it uses three lenses. Made of brass, wood, and other materials. (Science Museum, London)
