[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.t4.7 # A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c12.t4.7 A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c12.t4.7 - **Language:** English ### [v1.c12.t4.7](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t4.7) Each of these again is divided into 4 classes according to its colour namely: Brāhmana, Kshatriya, Vaisya and Sūdra.² 30 - [Previous: v1.c12.t4.6](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t4.6) - [Next: v1.c12.t4.8](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t4.8) - [Up: v1.c12.t4](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t4) --- Source: [https://indike.org/pramana/ins.science.ray-1902.v1.c12.t4.7](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t4.7) · Pramāṇa