Designed by the Greek inventor Heron, this coin-operated holy water dispenser was used in Egyptian temples to dispense water for ritual washings. Worshippers would place a coin into the machine and ...
who in 1824 added extra washings to isolate pure silicon. It is now produced on a large scale by heating silica with carbon in an electric furnace, at high temperatures (1,900–2,350 °C ...
After weeks of testing, this board looked almost untouched. That said, it still had not lost its beet stains after a few washings, and its sides tended to dry out more than those of other boards.