Water wheel Triger's caisson, 19th century The Earth's seasons Tawny owl, historical artwork Steam-powered coach, 1829 Shoveler duck, historical artwork Rainbow optics, historical artwork Perpetual motion machine, 19th century Little stint, historical artwork Hughes' printing telegraph High-pressure steam engine, 19th century Grey phalarope, historical artwork Early video phone system, 1930 Early escalator, 1894 Early electric train Durer's Celestial Globe, 1515 Boring a hole Bees 19th-century mining machine Telegraph Key (Morse Code) Type J-37 Guillaume Lemonnier1717-1799 19th Century electrical equipment 19th Century Electric Telegraph Equipment 19th century chart of ocean currents Rorschach Inkblot Test Early astronomical spectroscopy Standard electrical circuit symbols Lamps connected in series Lamps connected in parallel Zenobe Gramme Torso bones Torso bones Tongue anatomy The four humours, diagram Sympathetic nerves, upper body Spinal bones and ligaments Skull anatomy Sir Walter Raleigh , English explorer Sets of fingerprints Pelvis bones and ligaments Nicolaus Copernicus, Polish astronomer Muscles of the side and back Muscles of the hand and forearm Muscles of the back Muscles of lower leg Medieval urine wheel Medical zodiac, 15th century diagram Lower leg bones and ligaments Page 1 Page 3