Faraday's electrolysis experiment, 1833 19th Century Electric Telegraph Equipment Arabic science timeline Triger's caisson, 19th century Africa, 16th century Spanish map Sacred lotus (Nelumbo nucifera) Early astronomical spectroscopy Muscles of the hand and forearm Water wheel Perpetual motion machine, 19th century Muscles of the foot 16th century map of Sardinia cartouche Villa Torrigiani, Camigliano village, Lucca, Tuscany, Italy, Europe Dioscorides, Ancient Greek physician Muscles of the back Cuneiform script Villa Torrigiani, Camigliano village, Lucca, Tuscany, Italy Dolmen, Neolithic burial chamber 4500 years old, Pembrokeshire, Wales Galen's spirit system Neolithic hunters Boring a hole Spinal bones and ligaments Lower leg bones and ligaments Arm bones Galileo Rainbow optics, historical artwork Umbrella bamboo (Fargesia murielae) Conrad Gessner's nature collection 15th century surgical equipment, artwork 19th-century mining machine Snow crystals Skull anatomy Foot bones and ligaments Tongue anatomy Tomato plant Guillaume Lemonnier1717-1799 Splitting of wood log Early escalator, 1894 Lamps connected in series Lamps connected in parallel Pelvis bones and ligaments Sympathetic nerves, upper body Acoustic echo Page 1 Page 2