[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.t5.40 # A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c12.t5.40 A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c12.t5.40 - **Language:** English ### [v1.c12.t5.40](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t5.40) Take of mercury one part, sulphur two parts and iron powder three parts and rub them with the juice of the Indian aloe and after 6 hours transfer the mass to a brass-vessel and cover it with the leaves of the castor-oil plant. At the end of an hour and a half the mass will become heated. It is then buried under a heap of paddy grains and taken out after three days and then powdered very fine and the contents passed through linen.¹ All the three varieties of iron are thus completely killed. Gold and other metals can be killed by this process after being reduced to fine powder like iron. - [Previous: v1.c12.t5.39](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t5.39) - [Next: v1.c12.t5.41](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t5.41) - [Up: v1.c12.t5](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t5) --- Source: [https://indike.org/pramana/ins.science.ray-1902.v1.c12.t5.40](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t5.40) · Pramāṇa