History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c12.67

c12.67

The urban civilization of the Indus Valley belongs formally to the Bronze Age, since copper and bronze were the only metals that were used for making tools and weapons. The findings at the Indus Valley sites prove that the metal workers of the two capital cities of Mohenjo-daro and Harappa were very skilful and had a plentiful supply of copper, silver and gold. Uses of lead and tin were not uncommon though the latter metal occurred always alloyed with copper in the form of bronze.