The gates of the Temple of Jerusalem used Corinthian bronze made by depletion gilding. It was most prevalent in Alexandria, where alchemy is thought to have begun. In ancient India, <answer>copper</answer> was used in the holistic medical science Ayurveda for surgical instruments and other medical equipment. Ancient Egyptians (~2400 BC) used <answer>copper</answer> for sterilizing wounds and drinking water, and later on for headaches, burns, and itching. The Baghdad Battery, with <answer>copper</answer> cylinders soldered to lead, dates back to 248 BC to AD 226 and resembles a galvanic cell, leading people to believe this was the first battery; the claim has not been verified.
What metal was used to make surgical equipment in ancient India?
copper