[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.c22.s2 # A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c22.s2: Sulphide of Copper A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c22.s2 - **Language:** English ### Sulphide of Copper ### [v1.c22.s2.1](https://indike.org/pramana/ins.science.ray-1902.v1.c22.s2.1) (Parpati tāmram p. 58) ### [v1.c22.s2.2](https://indike.org/pramana/ins.science.ray-1902.v1.c22.s2.2) 0·704 g. subst., heated in a current of hydrogen with powdered sulphur (Rose's method), till the weight was constant, gave 0·697 g. It is thus evident that this preparation is nearly pure cuprous sulphide (Cu₂S). --- Source: [https://indike.org/pramana/ins.science.ray-1902.v1.c22.s2](https://indike.org/pramana/ins.science.ray-1902.v1.c22.s2) · Pramāṇa