[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D.](https://indike.org/pramana/ins.science.ray-1902) › v1.c12.t3.1 # A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c12.t3.1 A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c12.t3.1 - **Language:** English ### [v1.c12.t3.1](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t3.1) Sulphur, red ochre, vitriol, alum, orpiment, realgar, anjana and \*kamkushtha\*—these are the eight uparasas, useful in operations of mercury. I - [Previous: v1.c12.t2.58](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t2.58) - [Next: v1.c12.t3.2](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t3.2) - [Up: v1.c12.t3](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t3) --- Source: [https://indike.org/pramana/ins.science.ray-1902.v1.c12.t3.1](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t3.1) · Pramāṇa