[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) › c25.9 # History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c25.9 History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c25.9 - **Language:** English ### [c25.9](https://indike.org/pramana/ins.science.ray-1956.c25.9) There are four kinds of sulphur:—white, black, yellow and red. - [Previous: c25.8](https://indike.org/pramana/ins.science.ray-1956.c25.8) - [Next: c25.10](https://indike.org/pramana/ins.science.ray-1956.c25.10) - [Up: c25](https://indike.org/pramana/ins.science.ray-1956.c25) --- Source: [https://indike.org/pramana/ins.science.ray-1956.c25.9](https://indike.org/pramana/ins.science.ray-1956.c25.9) · Pramāṇa