[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.c11.t13 # A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c11.t13: Garbha Yantram A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c11.t13 - **Language:** English ### Garbha Yantram ### [v1.c11.t13.1](https://indike.org/pramana/ins.science.ray-1902.v1.c11.t13.1) "I shall now describe the Garbha Yantram for reducing \*pistikā\*¹ to ashes. Make a crucible 4 digits in length, and 3 digits in width, with its mouth rounded. Take 20 parts of salt and one of bdellium and pound them finely, adding water frequently; rub the crucible with this mixture. \* \* \* Make a fire of paddy husks and apply gentle heat. In the course of one to three days the mercury is reduced to ashes." \[\*Vide\* Illustrations.\] ### [v1.c11.t13.2](https://indike.org/pramana/ins.science.ray-1902.v1.c11.t13.2) ¹ A cake of mercury and sulphur. --- Source: [https://indike.org/pramana/ins.science.ray-1902.v1.c11.t13](https://indike.org/pramana/ins.science.ray-1902.v1.c11.t13) · Pramāṇa