[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [Yantras or Mechanical Contrivances in Ancient India](https://indike.org/pramana/ins.science.raghavan-1952) › c2.163 # Yantras or Mechanical Contrivances in Ancient India c2.163 Yantras or Mechanical Contrivances in Ancient India c2.163 - **Language:** English ### [c2.163](https://indike.org/pramana/ins.science.raghavan-1952.c2.163) The machines are then divided into two classes, \*Svayam-vāhaka\*, automatic and \*Sakrit-prerya\*, requiring occasional propelling; most machines combine these two features (13). Another classification is: the concealed, \*Antarita\* or \*Alakshya\*, \*i.e.\*, the principle of its action and its motor-mechanism are hidden - [Previous: c2.162](https://indike.org/pramana/ins.science.raghavan-1952.c2.162) - [Next: c2.164](https://indike.org/pramana/ins.science.raghavan-1952.c2.164) - [Up: c2](https://indike.org/pramana/ins.science.raghavan-1952.c2) ## Linked texts (1) - [Samarāṅgaṇasūtradhāra](https://indike.org/pramana/in.art.silpa.samaranganasutradhara.31.13) — Bhoja, Sanskrit --- Source: [https://indike.org/pramana/ins.science.raghavan-1952.c2.163](https://indike.org/pramana/ins.science.raghavan-1952.c2.163) · Pramāṇa