Sherlock Holmes and Dr. Watson Spine anatomy Durer's Rhinoceros, 1515 Foot anatomy by Leonardo da Vinci Butterflies, artwork Newton's optics Olive trees, Puglia, Italy, Europe Rhazes, Islamic scholar Development of the English alphabet Early electrical equipment Standard electrical circuit symbols Shelduck, historical artwork Spine anatomy Egyptian creation myth Rorschach Inkblot Test Nicolaus Copernicus, Polish astronomer Flame emission spectra of alkali metals Early electric lamps 16th century map of Venice Distillation, 16th century woodcut Computer hard disk assembly Body musculature Body musculature Iron pyrites Features of fingerprints Homeric cosmogony Hughes' printing telegraph Foot bones Phrenology chart Muscles of the foot Phonetic Egyptian hieroglyphs Red kite, historical artwork Anglo-Saxon 10th century world map Mappa Mundi by La Cosa in 1500 Early petrol locomotives Brain anatomy, 16th century diagram Skull anatomy Rainbow optics, historical artwork Medical zodiac, 15th century diagram Grey phalarope, historical artwork Heron/Hero of Alexandria, mathematician Early astronomical spectroscopy Francesco Sforza, military leader Little stint, historical artwork Four Horsemen of the Apocalypse Facial nerves Telegraph Key (Morse Code) Type J-37 Rainhill Trials steam trains, 1829 Page 2 Page 3