Agriculture,Paul Woodruff,Heinrich Gustav Reichenbach , high quality portrait

Intrinsic value (ethics),Ludwig Reichenbach,Domestication , high quality portrait

Anton Reichenow,Grafting,Elis (city) , high quality portrait

Working animal,Sophist,Caspar Georg Carl Reinwardt , high quality portrait

Mathematics,Bernhard Rensch,Clothing , high quality portrait

Ralf Reski,Sewing machine,Astronomy , high quality portrait

Cooking,Rhetoric,Physcomitrella , high quality portrait

Olympia, Greece,Achille Richard,Beer , high quality portrait

Jean Michel Claude Richard,Bread,Athens , high quality portrait

Cheese,Sparta,Louis Claude Richard , high quality portrait

Greece,Olivier Jules Richard,Mill (grinding) , high quality portrait

John Richardson (naturalist),Wine,Inycus , high quality portrait

Food storage,Sicily,Charles Richet , high quality portrait

Obolus,Charles Wallace Richmond,Pottery , high quality portrait

Robert Ridgway,Sanitation,Lacedaemonians , high quality portrait

Plumbing,Laconia,Henry Nicholas Ridley , high quality portrait

Arithmetic,Christina Riesselman,Toilet , high quality portrait

Austin Roberts (zoologist),Tool,Irony , high quality portrait

Blade,Goddess,Harold E. Robinson , high quality portrait

Athena,Maurício Rocha e Silva,Hammer , high quality portrait

Martin Rodbell,Plough,Parthenon , high quality portrait

Wedge,Phidias,George Romanes , high quality portrait

Achilles,Alfred Romer,Weapon , high quality portrait

Robert Rosen (theoretical biologist),Gun,Heracles , high quality portrait

Accounting,Dorothy Tarrant,Joel Rosenbaum , high quality portrait

W. K. C. Guthrie,Harald Rosenthal,Calculation , high quality portrait

Miriam Louisa Rothschild,Abacus,Anno Domini , high quality portrait

Calendar,Internet Encyclopedia of Philosophy,Walter Rothschild, 2nd Baron Rothschild , high quality portrait

John M. Cooper (philosopher),Joan Roughgarden,Cryptography , high quality portrait

William Roxburgh,Lock and key,Dictionary of Greek and Roman Biography and Mythology , high quality portrait

Money,Archon,Adriaan van Royen , high quality portrait

Archon of Athens,Karl Rudolphi,Banknote , high quality portrait

Eduard Rüppell,Coin,Émile Chartier , high quality portrait

Musical instrument,LibriVox,Joseph Sabine , high quality portrait

George Burges,Julius von Sachs,Phonograph , high quality portrait

Frederick Sanger,Toy,Bibliography of Socrates , high quality portrait

Game,List of cultural depictions of Socrates,Étienne Geoffroy Saint-Hilaire , high quality portrait

Trial of Socrates,Isidore Geoffroy Saint-Hilaire,Video game , high quality portrait

Carl Ulisses von Salis-Marschlins,Writing,Socratic problem , high quality portrait

Book,Gadfly (philosophy and social science),Edward James Salisbury , high quality portrait

Socratic dialogue,Richard Anthony Salisbury,Map , high quality portrait

Jonas Salk,Printing press,Moral intellectualism , high quality portrait

Typewriter,Socratic method,Robert Sapolsky , high quality portrait

I know that I know nothing,Georg Ossian Sars,Construction , high quality portrait

Michael Sars,Aqueduct (water supply),Socratic questioning , high quality portrait

Canal,The unexamined life is not worth living,Konstantin Satunin , high quality portrait

Sophroniscus,William Saunders (botanist),Irrigation , high quality portrait

Marie Jules César Savigny,Arch,Phaenarete , high quality portrait

Bridge,Xanthippe,Thomas Say , high quality portrait

Lamprocles,George Schaller,Building , high quality portrait

Albert Schatz (scientist),Fortification,Menexenus , high quality portrait

Foundation (engineering),Myrto,Paul Schimmel , high quality portrait

Double Herm of Socrates and Seneca,Friedrich Schlechter,Scaffolding , high quality portrait

Hermann Schlegel,Tower,The Death of Socrates , high quality portrait

Dam,Socrates (sculpture),Matthias Jakob Schleiden , high quality portrait

The Clouds,George Schoener,Caisson (engineering) , high quality portrait

Rudolph Schoenheimer,Road,Der geduldige Socrates , high quality portrait

Tunnel,Socrates (Voltaire),Johann David Schoepf , high quality portrait

Socrate,Heinrich Wilhelm Schott,Transport , high quality portrait

Johann Christian Daniel von Schreber,Aircraft,Socrates on Trial , high quality portrait

Aerostat,De genio Socratis,Leopold von Schrenck , high quality portrait

On the Concept of Irony with Continual Reference to Socrates,Charles Schuchert,Airplane , high quality portrait

Stefan Schuster,Compass,The Plot to Save Socrates , high quality portrait

Elevator,Serenade after Plato's "Symposium",Theodor Schwann , high quality portrait

Barefoot in Athens,Neena Schwartz,Horseback riding , high quality portrait

Georg August Schweinfurth,Stirrup,Socrates (film) , high quality portrait

Jet engine,List of speakers in Plato's dialogues,Philip Sclater , high quality portrait

Republic (Plato),Giovanni Antonio Scopoli,Rocket , high quality portrait

Henry Seebohm,Motor vehicle,Apology (Xenophon) , high quality portrait

Railroad,Memorabilia (Xenophon),Michael Sela , high quality portrait

Oeconomicus,Prideaux John Selby,Train , high quality portrait

Nikolai Alekseevich Severtzov,Scuba set,Symposium (Xenophon) , high quality portrait

Spacecraft,Codex Vaticanus Graecus 64,Richard Bowdler Sharpe , high quality portrait

Peritrope,George Shaw (biologist),Satellite , high quality portrait

George Ernest Shelley,Space station,Religious skepticism , high quality portrait

Space suit,Seventh Letter,Charles Scott Sherrington , high quality portrait

Platonic love,Philipp Franz von Siebold,Sailing , high quality portrait

George Gaylord Simpson,Manufacturing,Cardinal virtues , high quality portrait

3D printing,Sophrosyne,Rolf Singer , high quality portrait

Anamnesis (philosophy),John Kunkel Small,Carpentry , high quality portrait

Andrew Smith (zoologist),Casting,Divine madness , high quality portrait

Injection moulding,Platonic solid,Edgar Albert Smith , high quality portrait

Anima mundi,Emil L. Smith,Lost-wax casting , high quality portrait

Frederick Smith (entomologist),Mass production,Hyperuranion , high quality portrait

Assembly line,Allegory of the Cave,James Edward Smith (botanist) , high quality portrait

List of manuscripts of Plato's dialogues,Johannes Jacobus Smith,Interchangeable parts , high quality portrait

James Leonard Brierley Smith,Machine tool,Cultural influence of Plato's Republic , high quality portrait

Welding,Neoplatonism and Gnosticism,John Maynard Smith , high quality portrait

Platonism in the Renaissance,Oliver Smithies,Simple machine , high quality portrait

John Otterbein Snyder,Axle,Neoplatonism and Christianity , high quality portrait

Bearing (mechanical),Oxyrhynchus Papyri,Solomon H. Snyder , high quality portrait

Papyrus Oxyrhynchus 23,Daniel Solander,Ball bearing , high quality portrait

Alberto Sols,Belt (mechanical),Papyrus Oxyrhynchus 24 , high quality portrait

Chain,Papyrus Oxyrhynchus 228,Louis François Auguste Souleyet , high quality portrait

Papyrus Oxyrhynchus 229,Douglas Spalding,Lever , high quality portrait

Lazzaro Spallanzani,Catapult,Plato's Dream , high quality portrait

Crane (machine),Poitier Meets Plato,Anders Sparrman , high quality portrait

Ancient Greece,Walter Baldwin Spencer,Shadoof , high quality portrait

Roger W. Sperry,Linkage (mechanical),Timaeus (dialogue) , high quality portrait

Cam,Laws (dialogue),Maximilian Spinola , high quality portrait

Platonic Academy,Johann Baptist von Spix,Clutch , high quality portrait

Herman Spöring Jr.,Four-bar linkage,Aristotle , high quality portrait

Piston,Theory of forms,Kurt Sprengel , high quality portrait

Parmenides,Stewart Springer,Rack and pinion , high quality portrait

Richard Spruce,Pendulum,Socrates , high quality portrait

Screw,Platonism,Agustín Stahl , high quality portrait

Doi (identifier),Franklin Stahl,Archimedes' screw , high quality portrait

Edward Stanley, 13th Earl of Derby,Spring (device),Wayback Machine , high quality portrait

Valve,Wikisource,G. Ledyard Stebbins , high quality portrait

ISBN (identifier),Japetus Steenstrup,Wheel , high quality portrait

Charles M. Steinberg,Block and tackle,Plato , high quality portrait

Flywheel,Life of Plato,Franz Steindachner , high quality portrait

Form of the Good,Joan Steitz,Gear , high quality portrait

Thomas A. Steitz,Potter's wheel,Plato's theory of soul , high quality portrait

Pulley,Platonic epistemology,Leonhard Hess Stejneger , high quality portrait

Analogy of the sun,Georg Wilhelm Steller,Wing , high quality portrait

James Francis Stephens,Machinery,Analogy of the divided line , high quality portrait

Agricultural machinery,Plato's political philosophy,Kaspar Maria von Sternberg , high quality portrait

Philosopher king,Karl Stetter,Home appliance , high quality portrait

Nettie Maria Stevens,Dishwasher,Ship of State , high quality portrait

Washing machine,Euthyphro dilemma,Frederick Campion Steward , high quality portrait

Ring of Gyges,Edward Charles Stirling,Engine , high quality portrait

Gerald Stokell,Internal combustion,Myth of Er , high quality portrait

Waterwheel,Demiurge,Witmer Stone , high quality portrait

Atlantis,Gottlieb Conrad Christian Storr,Windmill , high quality portrait

Vida Stout,Heavy equipment,Euthyphro , high quality portrait

Hydraulic machinery,Apology (Plato),Eduard Strasburger , high quality portrait

Crito,Erwin Stresemann,Hydraulic cylinder , high quality portrait

John Struthers (anatomist),Hydraulic manifold,Phaedo , high quality portrait

Pump,Cratylus (dialogue),Ligament of Struthers , high quality portrait

Theaetetus (dialogue),Alfred Henry Sturtevant,Mechanism (engineering) , high quality portrait

Samuel Stutchbury,Clock,Sophist (dialogue) , high quality portrait

Differential (mechanical device),Statesman (dialogue),Thecodontosaurus , high quality portrait

Parmenides (dialogue),Lubert Stryer,Epicyclic gearing , high quality portrait

Richard Summerbell,Gimbal,Philebus , high quality portrait

Gyroscope,Symposium (Plato),Carl Jakob Sundevall , high quality portrait

Phaedrus (dialogue),Mriganka Sur,Whippletree (mechanism) , high quality portrait

Henry Suter,MEMS,First Alcibiades , high quality portrait

Pneumatics,Second Alcibiades,Mary Sutherland (New Zealand) , high quality portrait

Hipparchus (dialogue),William John Swainson,Compressor , high quality portrait

Jan Swammerdam,Jackhammer,Rival Lovers , high quality portrait

Rivet gun,Theages,Olof Swartz , high quality portrait

Charmides (dialogue),Robert Swinhoe,Vacuum pump , high quality portrait

Colonel W. H. Sykes,Robotics,Laches (dialogue) , high quality portrait

Robotic arm,Lysis (dialogue),Deccan , high quality portrait

Władysław Taczanowski,Energy development,Protagoras (dialogue) , high quality portrait

Control of fire,Gorgias (dialogue),Armen Takhtajan , high quality portrait

Meno,Charles Tanford,Charcoal burner , high quality portrait

Diana Temple,Oven,Hippias Minor , high quality portrait

Energy storage,Ion (dialogue),Respiratory pharmacology , high quality portrait

Menexenus (dialogue),Peter Gustaf Tengmalm,Electric battery , high quality portrait

Coenraad Jacob Temminck,Geothermal power,Clitophon (dialogue) , high quality portrait

Minos (dialogue),Johannes Thiele (zoologist),Heat pump , high quality portrait

Mason B. Thomas,Nuclear power,Epinomis , high quality portrait

Oil drilling,Epistles (Plato),Oldfield Thomas , high quality portrait

Definitions (Plato),D'Arcy Wentworth Thompson,Fracking , high quality portrait

On Growth and Form,Refrigeration,On Justice , high quality portrait

Air conditioning,On Virtue,William Thompson (Ornithologist) , high quality portrait

Demodocus (dialogue),Charles Wyville Thomson,Refrigerator , high quality portrait

Louis-Marie Aubert du Petit-Thouars,Solar power,Sisyphus (dialogue) , high quality portrait

Photovoltaics,Halcyon (dialogue),Carl Peter Thunberg , high quality portrait

Eryxias (dialogue),Samuel Tickell,Material , high quality portrait

Niko Tinbergen,Cement,Axiochus (dialogue) , high quality portrait

Concrete,Epigrams (Plato),Ignacio Tinoco Jr. , high quality portrait

Commentaries on Plato,Arne Tiselius,Ceramic , high quality portrait

Agostino Todaro,Brick,Middle Platonism , high quality portrait

Chipped stone,Neoplatonism,Susumu Tonegawa , high quality portrait

Allegorical interpretations of Plato,John Torrey,Glass , high quality portrait

Joseph Pitton de Tournefort,Masonry,Plato's unwritten doctrines , high quality portrait

Metallurgy,Hippias,John Kirk Townsend , high quality portrait

Paul Woodruff,Thomas Stewart Traill,Hall–Héroult process , high quality portrait

Abraham Trembley,Bronze,Elis (city) , high quality portrait

Ironworking,Sophist,Melchior Treub , high quality portrait

Astronomy,Henry Baker Tristram,Steel , high quality portrait

Robert Trivers,Nanomaterials,Athens , high quality portrait

Paper,Greece,Édouard Louis Trouessart , high quality portrait

Irony,Frederick W. True,Plastic , high quality portrait

George Washington Tryon,Rammed earth,Socratic problem , high quality portrait

Recycling,I know that I know nothing,Chen-Lu Tsou , high quality portrait

List of speakers in Plato's dialogues,Bernard Tucker,Rubber , high quality portrait

Edward Tuckerman,Vulcanization,Republic (Plato) , high quality portrait

Textile,Peritrope,Endel Tulving , high quality portrait

Ancient Greece,Marmaduke Tunstall,Loom , high quality portrait

Ruth Turner,Spinning wheel,Timaeus (dialogue) , high quality portrait

Biotechnology,Aristotle,William Turton , high quality portrait

Theory of forms,Jakob von Uexküll,Birth control , high quality portrait

Merton F. Utter,Blood transfusion,Doi (identifier) , high quality portrait

Dentistry,Wikisource,Sebastien Vaillant , high quality portrait

ISBN (identifier),Achille Valenciennes,Genetic engineering , high quality portrait

James W. Valentine,CRISPR gene editing,Plato , high quality portrait

Genetic testing,Form of the Good,Pablo DT Valenzuela , high quality portrait

Euthyphro dilemma,Ruth van Heyningen,Polymerase chain reaction , high quality portrait

Donald Van Slyke,Hospital,Euthyphro , high quality portrait

Medical imaging,Apology (Plato),Francisco Varela , high quality portrait

Crito,Nikolai Vavilov,Medication , high quality portrait

Lysenkoism,Anesthesia,Phaedo , high quality portrait

Antibiotic,Cratylus (dialogue),Damodaran M. Vasudevan , high quality portrait

Theaetetus (dialogue),Craig Venter,Prosthesis , high quality portrait

Jules Verreaux,Surgery,Sophist (dialogue) , high quality portrait

Vaccine,Statesman (dialogue),Addison Emery Verrill , high quality portrait