Telegraph Key (Morse Code) Type J-37 Dioscorides, Ancient Greek physician Muscles of the back 19th Century Electric Telegraph Equipment Faraday's electrolysis experiment, 1833 Africa, 16th century Spanish map Triger's caisson, 19th century Arabic science timeline Sacred lotus (Nelumbo nucifera) Early astronomical spectroscopy Muscles of the hand and forearm Villa Torrigiani, Camigliano village, Lucca, Tuscany, Italy, Europe Perpetual motion machine, 19th century Water wheel 16th century map of Sardinia cartouche Cuneiform script Galen's spirit system Villa Torrigiani, Camigliano village, Lucca, Tuscany, Italy Boring a hole Dolmen, Neolithic burial chamber 4500 years old, Pembrokeshire, Wales Neolithic hunters Spinal bones and ligaments Arm bones Lower leg bones and ligaments Galileo Rainbow optics, historical artwork Umbrella bamboo (Fargesia murielae) Conrad Gessner's nature collection 19th-century mining machine 15th century surgical equipment, artwork Snow crystals Skull anatomy Foot bones and ligaments Tongue anatomy Tomato plant Guillaume Lemonnier1717-1799 Early escalator, 1894 Splitting of wood log Lamps connected in series Lamps connected in parallel Sympathetic nerves, upper body Acoustic echo Pelvis bones and ligaments Page 1 Page 2