Theory Collection (page 2)

Mendel / Inheritance / Mice
Diagram using real mice to show Mendels inheritance in mice theory

Empedocles of Akragas, Greek philosopher
Empedocles of Akragas (fl. 444-443 BC), Ancient Greek pre-Socratic philosopher, doctor, statesman and priest, best known for originating the cosmogonic theory of the four classical elements

The Four Temperaments
5310124 The Four Temperaments; (add.info.: Woodblock engraving depicting the Four Temperaments: Choleric (with lion), Sanguine (with ape), Phlegmatic (with sheep), and Melancholy (with hog)

Dedication to Wilhelm Wolff from 'Das Kapital. Kritik der politischen Oekonomie' (Book 1)
5668996 Dedication to Wilhelm Wolff from 'Das Kapital. Kritik der politischen Oekonomie' (Book 1) by Karl Marx published in 1867; (add.info)

Pigeons used by Charles Darwin at Down House, near Beckenham, Kent, England, during his work on his theory of descent
530398 Pigeons used by Charles Darwin at Down House, near Beckenham, Kent, England, during his work on his theory of descent. Wood engraving, 1887.; Universal History Archive/UIG.

Max Johann Sigismund Schultze, 1850
1576982 Max Johann Sigismund Schultze, 1850; (add.info.: Max Johann Sigismund Schultze (March 25, 1825 - January 16, 1874) was a German microscopic anatomist

Joseph Priestley English theologian, 19th century (engraving)
3733576 Joseph Priestley English theologian, 19th century (engraving); (add.info.: Portrait of Joseph Priestley (1733-1804) an English theologian, English Dissenters clergyman, natural philosopher

Thomas Henry Huxley, 1825 - 1895
3083225 Thomas Henry Huxley, 1825 - 1895.; Private Collection; (add.info.: English biologist aka "Darwin's Bulldog" for his advocacy of Charles Darwin's theory of evolution)

Charles Robert Darwin, 1850
1576969 Charles Robert Darwin, 1850; (add.info.: Charles Robert Darwin (12th February 1809 - 19th April 1882) was an English naturalist and geologist

Coral reef surrounding a lagoon. Slow accumulation of substance from generations of corals was a phenomenon which
530405 Coral reef surrounding a lagoon. Slow accumulation of substance from generations of corals was a phenomenon which Darwin used to support they theory of a long geological timescale

Illustration by Rene Descartes, showing the theory of terrestrial and celestial magnetism
5311509 Illustration by Rene Descartes, showing the theory of terrestrial and celestial magnetism. From Principia Philosophica; Amsterdam, 1672; Universal History Archive/UIG.

Title page of 'Das Kapital. Kritik der politischen Oekonomie' (Book 1) by Karl Marx published in 1867
5668995 Title page of 'Das Kapital. Kritik der politischen Oekonomie' (Book 1) by Karl Marx published in 1867; (add.info.: Karl Marx (1818-1883)); Photo © AF Fotografie.

Portrait of Niccolo Machiavelli: Italian Renaissance political writer, from 1550 edition of 'The Prince'
5668976 Portrait of Niccolo Machiavelli: Italian Renaissance political writer, from 1550 edition of 'The Prince' (woodcut); (add.info)

William Fleetwood Sheppard
3585768 William Fleetwood Sheppard; (add.info.: Portrait of William Fleetwood Sheppard (1863-1936) Australian-British civil servant, mathematician and statistician

Wilhelm Waldeyer, 1880
1576978 Wilhelm Waldeyer, 1880; (add.info.: Wilhelm Waldeyer (6th October 1836 - 23 January 1921) was a German anatomist, famous for development of the neuron theory.); Universal History Archive/UIG.

Coral Reef: hand coloured engraving published 1849. Time taken for building of coral reefs
530404 Coral Reef: hand coloured engraving published 1849. Time taken for building of coral reefs and islands was a proof used by Charles Darwin to support the theory of a long geological timescale.;

Giraffe browsing on tree. Hand-coloured engraving published 1836
533416 Giraffe browsing on tree. Hand-coloured engraving published 1836.; (add.info.: Giraffe browsing on tree. Jean Lamarck (1744-1829) French naturalist

Diagram explaining the Christiaan Huygens' wave theory of light by refraction
5310316 Diagram explaining the Christiaan Huygens' wave theory of light by refraction; (add.info.: Diagram explaining the Christiaan Huygens' wave theory of light by refraction)

Title page from 'The Prince' and other works by Niccolo Machiavelli published in 1532
5668978 Title page from 'The Prince' and other works by Niccolo Machiavelli published in 1532; (add.info.: Niccolo Machiavelli (1469-1527)); Photo © AF Fotografie.

RICKERT, Heinrich (1863-1936). German philosopher, one of the leading Neo-Kantians. Engraving
CUL4851923 RICKERT, Heinrich (1863-1936). German philosopher, one of the leading Neo-Kantians. Engraving by Unknown Artist; (add.info.: RICKERT, Heinrich (1863-1936)

Caricature, 1871
1574899 Caricature, 1871; (add.info.: Caricature showing English naturalist Charles Darwin as a monkey hanging from the tree of Science)

Matthias Jakob Schleiden, 1840
1576986 Matthias Jakob Schleiden, 1840; (add.info.: Matthias Jakob Schleiden (5 April 1804 - 23 June 1881) was a German botanist

An 1878 caricature lampooning Charles Darwins theory (Darwinism) that Humans are descendents or related to Apes
5308581 An 1878 caricature lampooning Charles Darwins theory (Darwinism) that Humans are descendents or related to Apes; (add.info)

A man as the microcosm within the universal macrocosm
5308104 A man as the microcosm within the universal macrocosm.; (add.info.: Engraving depicting a man as the microcosm within the universal macrocosm for the sulphur/Mercury theory for the production)

James Plaisted Wilde, 1st Baron Penzance, 1816 - 1899
3062092 James Plaisted Wilde, 1st Baron Penzance, 1816 - 1899.; Private Collection; (add.info.: British judge, rose breeder)

Joseph Priestley's battery of Leyden jars
3733574 Joseph Priestley's battery of Leyden jars.; (add.info.: Print depicting Joseph Priestley's battery of Leyden jars)

Iguana, the great herbivorous sea lizard of the Galapagos Islands. Charles Darwin's study of the fauna of
530396 Iguana, the great herbivorous sea lizard of the Galapagos Islands. Charles Darwin's study of the fauna of the islands contributed to his theory of evolution

Robert Hooke (1635 - 1703) English scientist. Title page of a 1745 edition of his work Micrographia
529157 Robert Hooke (1635 - 1703) English scientist. Title page of a 1745 edition of his work Micrographia, detailing his observations through various lenses

Das Kapital. Kritik der politischen Oekonomie' (Book 1) by Karl Marx title page of the first 1872 Russian language
5669001 Das Kapital. Kritik der politischen Oekonomie' (Book 1) by Karl Marx title page of the first 1872 Russian language edition of published in 1867; (add.info)

Signature of Charles Robert Darwin, from Meyers Lexicon, pub. 1924 (print)
3473172 Signature of Charles Robert Darwin, from Meyers Lexicon, pub. 1924 (print) by German School, (20th century); (add.info.: Signature of Charles Robert Darwin, 1809 - 1882)

Giant tortoises of the Galapagos Islands which were observed by Charles Darwin
530394 Giant tortoises of the Galapagos Islands which were observed by Charles Darwin. In foreground are two Finches, another group of Galapagos fauna of which Darwin made a particular study

HMS Beagle' laid ashore: River Santa Cruz, 1839 (engraving)
533508 HMS Beagle' laid ashore: River Santa Cruz, 1839 (engraving); (add.info.: HMS Beagle' laid ashore: River Santa Cruz)

Giant Land Tortoises of the Galapagos Islands. Charles Darwin's study of the fauna of the Islands contributed to
530395 Giant Land Tortoises of the Galapagos Islands. Charles Darwin's study of the fauna of the Islands contributed to his theory of evolution

John Dalton (1766-1844) English chemist. Dalton's table of Atomic symbols from a lecture delivered by him at
530599 John Dalton (1766-1844) English chemist. Dalton's table of Atomic symbols from a lecture delivered by him at the Manchester Mechanic's Institution

Portrait of Daniele Barbaro, 1556-1562. Creator: Paolo Veronese
Portrait of Daniele Barbaro, 1556-1562

Paul Serusier, 1903. Creator: Odilon Redon
Paul Serusier, 1903

SCHLEIDEN, Matthias Jakob (1804-1881). German botanist and co-founder of the cell theory. Litography

Diagram illustrating the theory of light and shade and sketches of figures, c1472-c1519 (1883)
Diagram illustrating the theory of light and shade and sketches of figures illustrating the movements of the human body, c1472-c1519 (1883). From The Literary Works of Leonardo Da Vinci, Vol

AZTEC UNIVERSE. The Aztec hieroglyphic symbol of the movement of the universe

SERVET, Miguel (1511-1553). Spanish doctor and theologian. Known for his theory on the circulation of blood. He was condemned as a heretic, and sentenced to death by being burned alive

Leon Trotsky, Bolshevik revolutionary and Marxist theorist
Leon Trotsky (Lev Davidovich Bronstein, 1879-1940), Bolshevik revolutionary and Marxist theorist, one of the leaders, with Lenin, of the Russian October Revolution of 1917

Karl Marx and his wife, Jenny (nee von Westphalen)
Karl Marx (1818-1883), German philosopher, political economist, historian, political theorist, sociologist, communist and revolutionary

Karl Marx monument, Moscow, Russia
The Karl Marx monument in Teatralnaya Square, Moscow, Russia, around the time of its unveiling in 1961. It was carved on the spot from a 200 ton block of granite

Karl Marx 1818 1883 German Philosophy Philosopher
karl, marx, 1818, 1883, german, philosophy, philosopher, politics, political, economist, history, historian, theory, theorist, social, science, scientist, sociology, sociologist, communism

Karl Marx monument, Highgate Cemetery, London
The monument to Karl Marx above his grave in Highgate Cemetery, North London. Seen here on a rainy day, with sightseers holding umbrellas

Karl Marx, German political writer and revolutionary
Karl Marx (1818-1883), German philosopher, political economist, historian, political theorist, sociologist, communist and revolutionary. Seen here in later years with white hair and beard. Date: 1882

Friedrich Engels (1820-1895), German social scientist, writer, political theorist, philosopher, and (with Karl Marx) father of communist theory. Date: late 19th century

Euclid or Archimedes: detail from the School of Athens in the Stanza della Segnatura, 1510-11 (fresco)
3362162 Euclid or Archimedes: detail from the School of Athens in the Stanza della Segnatura, 1510-11 (fresco) by Raphael (Raffaello Sanzio of Urbino) (1483-1520); Vatican Museums and Galleries

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"Theory: Unveiling the Hidden Patterns of the Universe" From ancient times to modern scientific breakthroughs, theories have shaped our understanding of the world. A histological diagram of a mammalian retina reveals intricate structures that support the theory of vision. Mendeleyev's periodic table, created in 1869, laid the foundation for understanding elements and their properties. Richard Feynman, a brilliant physicist depicted in a caricature, contributed to quantum mechanics and explained complex concepts with his unique approach. The standard periodic table showcases various element types discovered over centuries. The bust of Claudius Galen reminds us of his influential medical theories during ancient Rome. An artwork depicting the universe timeline takes us on an awe-inspiring journey through cosmic evolution. A geological unconformity on the river Jed hints at Earth's dynamic nature and supports theories about plate tectonics. Starlight bent by the Sun's attraction highlights Einstein's theory of general relativity, revolutionizing our perception of gravity. Dalton's table of atomic symbols from 1835 provides insights into early attempts to understand matter at its fundamental level. Continental drift maps demonstrate how continents have shifted over millions of years due to plate tectonics. The concept of multiple universes challenges conventional thinking and expands our imagination beyond what we can observe directly. Theories continue to push boundaries and inspire new discoveries as humanity strives to unravel the mysteries surrounding us. In this captivating collage, we witness how theories connect seemingly disparate fields - from biology and chemistry to physics and geology - offering glimpses into profound truths that shape our existence in this vast universe.