[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) › c15.97 # History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c15.97 History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c15.97 - **Language:** English ### [c15.97](https://indike.org/pramana/ins.science.ray-1956.c15.97) Under the recipe of a pearl compound, there is mention of pearl, powder of iron, copper and sulphur. The metals are obviously used after being roasted with sulphur. The process is described as the \*killing of metals\*. - [Previous: c15.96](https://indike.org/pramana/ins.science.ray-1956.c15.96) - [Next: c15.98](https://indike.org/pramana/ins.science.ray-1956.c15.98) - [Up: c15](https://indike.org/pramana/ins.science.ray-1956.c15) --- Source: [https://indike.org/pramana/ins.science.ray-1956.c15.97](https://indike.org/pramana/ins.science.ray-1956.c15.97) · Pramāṇa