INDIAN HISTORY

Detailed explanation-1: -Harappans were among the first to develop a system of uniform weights and measures that conformed to a successive scale. The smallest division, approximately 1.6 mm, was marked on an ivory scale found in Lothal, a prominent Indus Valley city in the modern Indian state of Gujarat.

Detailed explanation-2: -Ivory is a main product that is seen in abundance and was used for trading in Harappan civilization. Finished ivory products that were seen in Harappan sites include kohl sticks, pins, awls, hooks, toggles, combs, game pieces, dice, inlay and other personal ornaments.

Detailed explanation-3: -For example, an ivory scale discovered at Lothal (in the western coast of India) has 27 uniformly spaced lines over 46 mm, indicating an unit of length corresponding to 1.70 mm [9].