Theory Collection

Histological Diagram of a Mammalian Retina
RAMON Y CAJAL, Santiago (1852-1934). Spanish doctor and histologist, Nobel Prize in 1906. Histological diagram of a mammalian retina. Original drawing by Ramon y Cajal

Continental drift maps
Reconstruction of the map of the world for three periods according to the Displacement Theory. Figs 1-2 from The Origin of Continents and Oceans (1924) by Alfred Wegener

Geological unconformity on the river Jed. Plate 3 from Theory of the Earth (1795) Vol. 1, by James Hutton

Starlight bent by the Suns Attraction: The Einstein Theory
This diagram drawn by W. B. Robinson illustrates Professor Einsteins Theory that light is subject to gravitation. The drawing was based on British observers photographs at the eclipse of the sun

Advertisement for a book about flying saucers
An advertisement for a book by Gray Barker, They Knew Too Much About Flying Saucers, suggesting cover-ups, conspiracy and paranoia surrounding UFO sightings

Claudius Galen (Bust)
CLAUDIUS GALEN Greek physician working in Rome, at court of Marcus Aurelius and Commodus : he tended the gladiators, and voiced theory of humours. Date: 129 - 199

Leonhard Euler, Swiss mathematician and physicist

SMITH, Adam (1723-1790). The Theory of Moral
" SMITH, Adam (1723-1790). " The Theory of Moral Sentiments". Half-title with portrait of the author. Published in 1809. Engraving. SPAIN. Barcelona

The Ironstein Theory of Golf, by William Heath Robinson
A prospective competitor in our 500 golf contest makes one of those fance drives that are so bewildering to the ordinary member of a local golf club

Man in the Iron Mask, playing the cello in prison
There are conflicting theories as to who this man was. One is that he was Count Ercole Antonio Mattioli (Matthioli or Marchioly, 1640-1703), an Italian diplomat, arrested as Eustache Dauger in 1669

Darwins Theory of Evolution
his theory is satirised - Am I a man and a brother Date: 1861 Source: unnamed artist in Punch 8 May 1861 page 206

Conversion of Galen
CLAUDIUS GALEN " Conversion of Galen" Greek physician to 5 Roman emperors and to gladiators. Author of the theory of the 4 humours

The late Charles Darwin
Article on Charles Darwin (1809 - 1882) with illustrations of his statue at the Natural History Museum, the exterior of his house at Down, near Beckenham, his study and green-house

DARWIN, Charles Robert (1809-1882). British naturalist, author of the theory of evolution by natural selection. Litography. UNITED KINGDOM. ENGLAND. Down. Down House

th Huxley / Downey Photo
THOMAS HENRY HUXLEY English scientist and champion of Darwins Theory of Evolution

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

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

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

The night patrol of the London streets, 1853
The night patrol of the London streets. The figure of Death on horseback rides out of an overcrowded cemetery full of cholera victims

Bishop Butler
Bishop Joseph Butler (1692-1752). Born in Wantage, of Berkshire (now Oxfordshire). He is best known for his critique of Deism, Thomas Hobbess egoism, and John Lockes theory of personal identity

Charles Darwin - English Naturalist
Charles Darwin (1809-1882) - English Naturalist and Geologist - pioneer of Evolutionary Theory. Date: circa 1870

John Dalton, English chemist and physicist
John Dalton (1766-1844), English chemist, meteorologist and physicist, formulator of Daltons Law of Partial Pressures concerning gases in water

PLANCK, Max Karl Ernst Ludwig (1858-1947). German theoretical physicist who originated quantum theory, which won him the Nobel Prize in Physics in 1918. Oil

SCHWANN, Theodor (1810 - 1882). German physiologist, anatomist and naturalist. He developed the cell theory. Oil

The Astrarium of Giovanni Dondi (1318-1388). Used to determine the position of planets according to he Ptolemaic theory of the Universe. National Museum of Science and Technology Leonardo da Vinci

Herbert Marcuse (1898-1979)
Marcuse, Herbert (Berlin, 1898, Starnberg, 1979). German-Jewish philosopher, political theorist and sociologist, and a member of the Frankfurt School

Professor Thomas Henry Huxley - British scientist
Professor Thomas Henry Huxley (1825-1895), British scientist (biologist), champion of Darwins Theory of Evolution. Date: 1890

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

Thomas Henry Huxley, English scientist
Thomas Henry Huxley (1825-1895), English scientist, champion of Darwins Theory of Evolution. Date: late 19th century

Postcard illustrating the merits of Free Trade - Larger Loaf
Postcard from 1906 issued as part of the campaign to elect the Liberal politician Sir Robert Henry Hobart, 1st Baronet (18361928) to office

Cantagrel Francois / Gill
Cantagrel Francois (1810-1887): Engineer, phalansterien, writer of numerous articles on the subject of socialist theory

th Huxley / W & Cockerell
THOMAS HENRY HUXLEY English scientist and champion of Darwins Theory of Evolution, in 1857

th Huxley / Book Photo
THOMAS HENRY HUXLEY English scientist and champion of Darwins Theory of Evolution

A New Theory of the Universe
Page from the Illustrated London News reporting on a new theory expounded by Professor A. S. Eddington Dr A. C. de la C. Crommelin

Jean-Jacques Rousseau (1712-1778). The Confessions. Colored
Jean-Jacques Rousseau (1712-1778). Philosopher, writer, and composer. The Confessions (1782-1789). Autobiographical book. Colored engraving

Lunar eclipse. Engraving
Lunar eclipse theory. Engraving in Astronomicon by Gaius Julius Hyginus. 1st century. Incunabula 283. Edition of 1485. Venice. Library of the University of Barcelona. Catalonia. Spain

Niccolo Machiavelli, Italian politician and writer
Niccolo Machiavelli (1469-1527), Italian politician and writer. circa early 16th century

Claudius Galen - 4
CLAUDIUS GALEN Greek physician working in Rome, at court of Marcus Aurelius and Commodus : he tended the gladiators, and voiced theory of humours. Date: 129 - 199

James Curry, Medical
JAMES CURRY : medical, lecturer on the Theory and Practice of Medicine at Guys Hospital, London : [do not confuse with James Currie, a medical contemporary] Date: flourished 1819

Cartoon, The disciple of Kant, WW1
Cartoon, The disciple of Kant. Showing a German follower of Kantian philosophy, with illustrations of Kants theory of Cause, Effect, and Sufficient Reason

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