[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) › c84.63 # History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c84.63 History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c84.63 - **Language:** English ### [c84.63](https://indike.org/pramana/ins.science.ray-1956.c84.63) 33. The learned knows the method of purifying the compound (copper and burnt lead), when it will have some (tingling) sound (\*sgra-ldan\*). The learned purifies lead according to the \*śāstras\*. - [Previous: c84.62](https://indike.org/pramana/ins.science.ray-1956.c84.62) - [Next: c84.64](https://indike.org/pramana/ins.science.ray-1956.c84.64) - [Up: c84](https://indike.org/pramana/ins.science.ray-1956.c84) --- Source: [https://indike.org/pramana/ins.science.ray-1956.c84.63](https://indike.org/pramana/ins.science.ray-1956.c84.63) · Pramāṇa