[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) › c30.8 # History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c30.8 History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c30.8 - **Language:** English ### [c30.8](https://indike.org/pramana/ins.science.ray-1956.c30.8) Project into melted gold its own weight of the ash of mercury, (when cooled) powder it and rub it with lemon-juice and cinnabar, and roast it in a covered crucible twelve times The gold thus acquires the colour of saffron. - [Previous: c30.7](https://indike.org/pramana/ins.science.ray-1956.c30.7) - [Next: c30.9](https://indike.org/pramana/ins.science.ray-1956.c30.9) - [Up: c30](https://indike.org/pramana/ins.science.ray-1956.c30) --- Source: [https://indike.org/pramana/ins.science.ray-1956.c30.8](https://indike.org/pramana/ins.science.ray-1956.c30.8) · Pramāṇa