[Pramāṇa](https://indike.org/pramana/) › [Physical](https://indike.org/pramana/inp) › [Artefacts](https://indike.org/pramana/inp.artefact) › [Indian Museum, Kolkata](https://indike.org/pramana/inp.artefact.im) › Model of a grinding machine # Model of a grinding machine Model of a grinding machine: It is a wooden cylinder that looks like a mortar having a circular opening on the top. The cylinder is hollowed inside. A ridge is present around the cylinder, just below its rim. - **Kind:** artefact --- Source: [https://indike.org/pramana/inp.artefact.im.5930](https://indike.org/pramana/inp.artefact.im.5930) · Pramāṇa