[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [The Materia Medica of the Hindus, compiled from Sanskrit Medical Works](https://indike.org/pramana/ins.science.dutt-1877) › c4.s3.20 # The Materia Medica of the Hindus, compiled from Sanskrit Medical Works c4.s3.20 The Materia Medica of the Hindus, compiled from Sanskrit Medical Works c4.s3.20 - **Language:** English ### [c4.s3.20](https://indike.org/pramana/ins.science.dutt-1877.c4.s3.20) द्रावक \*Drávaka\* or distilled mineral acids. Several formulæ are given in different works for the preparation of mineral acids. A number of mineral substances or salts are heated in a retort and the distilled fluid collected in a glass receiver. The test of acids is said to be their property of dissolving a cowrie or shell thrown into them. The following are two examples of the compositions used for preparing mineral acids. - [Previous: c4.s3.19](https://indike.org/pramana/ins.science.dutt-1877.c4.s3.19) - [Next: c4.s3.21](https://indike.org/pramana/ins.science.dutt-1877.c4.s3.21) - [Up: c4.s3](https://indike.org/pramana/ins.science.dutt-1877.c4.s3) --- Source: [https://indike.org/pramana/ins.science.dutt-1877.c4.s3.20](https://indike.org/pramana/ins.science.dutt-1877.c4.s3.20) · Pramāṇa