[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Archaeology, epigraphy and coins](https://indike.org/pramana/ins.epigraphy) › [The Indus Civilization](https://indike.org/pramana/ins.epigraphy.mackay-1935) › c8.6 # The Indus Civilization c8.6 The Indus Civilization c8.6 - **Language:** English ### [c8.6](https://indike.org/pramana/ins.epigraphy.mackay-1935.c8.6) The finding of a considerable amount of copper ore in a brick-lined pit at Mohenjo-daro proves that this metal was smelted there, although no furnaces have been discovered in which it could have been reduced. A very simple method would have been to heat the ore mixed with charcoal in a hole in the ground by means of a blast. The shape of several copper ingots from the city, one of which weighs two and a half pounds, suggests that this was done, and that the metal when molten ran through a channel into an even, semi-circular depression in the ground; a projection on one side of some of these ingots shows how the moulds were filled. The flat upper surfaces of all the ingots are very puckered owing to unequal cooling. - [Previous: c8.5](https://indike.org/pramana/ins.epigraphy.mackay-1935.c8.5) - [Next: c8.7](https://indike.org/pramana/ins.epigraphy.mackay-1935.c8.7) - [Up: c8](https://indike.org/pramana/ins.epigraphy.mackay-1935.c8) ## Linked texts (1) - [Mohenjo-daro](https://indike.org/pramana/inp.site.mohenjo-daro) --- Source: [https://indike.org/pramana/ins.epigraphy.mackay-1935.c8.6](https://indike.org/pramana/ins.epigraphy.mackay-1935.c8.6) · Pramāṇa