[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray](https://indike.org/pramana/ins.science.ray-1956) › c84.57 # History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c84.57 History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c84.57 - **Language:** English ### [c84.57](https://indike.org/pramana/ins.science.ray-1956.c84.57) 30. The method of purifying rass is to be learnt properly. The learned knows the method of making brass dust by rubbing it with salt and urine for several days. And, afterwards, put (brass dust) in three earthenware pots (\*kon.bu\*) again and again (for washing). Then brass will be purified. - [Previous: c84.56](https://indike.org/pramana/ins.science.ray-1956.c84.56) - [Next: c84.58](https://indike.org/pramana/ins.science.ray-1956.c84.58) - [Up: c84](https://indike.org/pramana/ins.science.ray-1956.c84) --- Source: [https://indike.org/pramana/ins.science.ray-1956.c84.57](https://indike.org/pramana/ins.science.ray-1956.c84.57) · Pramāṇa