[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) › c84.20 # History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c84.20 History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c84.20 - **Language:** English ### [c84.20](https://indike.org/pramana/ins.science.ray-1956.c84.20) 10. These three are the rarest things on the surface of the earth: - [Previous: c84.19](https://indike.org/pramana/ins.science.ray-1956.c84.19) - [Next: c84.21](https://indike.org/pramana/ins.science.ray-1956.c84.21) - [Up: c84](https://indike.org/pramana/ins.science.ray-1956.c84) --- Source: [https://indike.org/pramana/ins.science.ray-1956.c84.20](https://indike.org/pramana/ins.science.ray-1956.c84.20) · Pramāṇa