[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) › c84.71 # History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c84.71 History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c84.71 - **Language:** English ### [c84.71](https://indike.org/pramana/ins.science.ray-1956.c84.71) 39. Expert people know how to extract \[\*bku\*\] by applying urine three times and by washing \[seven\] several times Thus the purification will be made. - [Previous: c84.70](https://indike.org/pramana/ins.science.ray-1956.c84.70) - [Next: c84.72](https://indike.org/pramana/ins.science.ray-1956.c84.72) - [Up: c84](https://indike.org/pramana/ins.science.ray-1956.c84) --- Source: [https://indike.org/pramana/ins.science.ray-1956.c84.71](https://indike.org/pramana/ins.science.ray-1956.c84.71) · Pramāṇa