[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) › c17.s3.27 # History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c17.s3.27 History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c17.s3.27 - **Language:** English ### [c17.s3.27](https://indike.org/pramana/ins.science.ray-1956.c17.s3.27) \*Extraction of Copper from Sasyaka.\*—"Take blue vitriol and one-fourth its weight of borax, and soak the mixture in the oil expressed from the seeds of \*Pongamia glabra\* for one day only and then place it in a covered crucible and heat in the charcoal fire—by this process an essence is obtained from it of the beautiful appearance of coccinella insect " - [Previous: c17.s3.26](https://indike.org/pramana/ins.science.ray-1956.c17.s3.26) - [Next: c17.s3.28](https://indike.org/pramana/ins.science.ray-1956.c17.s3.28) - [Up: c17.s3](https://indike.org/pramana/ins.science.ray-1956.c17.s3) --- Source: [https://indike.org/pramana/ins.science.ray-1956.c17.s3.27](https://indike.org/pramana/ins.science.ray-1956.c17.s3.27) · Pramāṇa