Write a short note on weights used by the Harappans.
Weights:
1. The weights were usually made of a stone called chert and were generally cubical in shape with no markings.
2. These weights were used for regulating exchanges.
3. The lower denominations of weight weere binary whereas higher denomination were in decimal with fractional weights.
4. The smaller weights were probably used for weighing jewellery and beads. Scale-pans of metal have also been found.