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Yantra (Samskrit: यन्त्रम्) refers to contrivances or instruments developed using the fundamental knowledge of mathematics, astronomy, physics, chemistry, agriculture etc., for enabling ease of activities in daily lives. On the other hand, in worship and ritualistic works they are regarded as devices for devotional sadhanas. These are used as tools for mental concentration and meditation. Enormous scientific marvels of modern day mechanical interventions and development of instruments and appliances in the past few centuries, may lead to a misplaced conclusion that sciences have only developed in the recent few centuries.   

Yantra (Samskrit: यन्त्रम्) refers to contrivances or instruments developed using the fundamental knowledge of mathematics, astronomy, physics, chemistry, agriculture etc., for enabling ease of activities in daily lives. On the other hand, in worship and ritualistic works they are regarded as devices for devotional sadhanas. These are used as tools for mental concentration and meditation. Enormous scientific marvels of modern day mechanical interventions and development of instruments and appliances in the past few centuries, may lead to a misplaced conclusion that sciences have only developed in the recent few centuries.   

Some very simple yantras are commonly known: the water-pulley in the well was called ''Ghatiyantra ;'' an oil-presser was ''Taila-yantra (तैलयन्त्रम्);'' wooden contrivances for pounding rice was ''kuttakayantra (कुट्टकयन्त्रम्);'' a cane-presser was ''Ikshu-yantra;'' ploughs, water-lifts and even weighing balances were referred to as yantras (Arthashastra 2.19<ref>Shamasastry. R, (1915) ''Kautilya's Arthashastra, Translation into English''. Bangalore: The Government Press</ref>). Complex yantras were used in warfare, astronomy and vimanas (aerial cars).

Some very simple yantras are commonly known: the water-pulley in the well was called ''Ghatiyantra ;'' an oil-presser was ''Taila-yantra (तैलयन्त्रम्);'' wooden contrivances for pounding rice was ''kuttakayantra (कुट्टकयन्त्रम्);'' a cane-presser was ''Ikshu-yantra;'' ploughs, water-lifts and even weighing balances were referred to as yantras (Arthashastra 2.19<ref>Shamasastry. R, (1915) ''Kautilya's Arthashastra, Translation into English''. Bangalore: The Government Press</ref>). Complex yantras were used in warfare, astronomy and vimanas (aerial cars).

Yantras, in Indian medicinal texts of [[Ayurveda (आयुर्वेदः)|Ayurveda]], refer to instruments used in surgery (shalya chiktsa). [[Rasashastra (रसशास्त्रम्)|Rasashastra]] texts of Ayurveda, mention the term Yantra to describe apparatuses used for preparation of Rasa drugs (rasa-aushadha-nirmana). The construction of yantras is described in the ancient literature with definite measurements and details for each arrangement. As per Rasasastra, metals and minerals needs to undergo specific procedures like shodhana, marana etc., before they could be administered into the body. All of this could be achieved with the help of yantras.<ref>Sen Aparna and S. Thara Lakshmi. ''A Review on the Yantras with special reference to commonly used Yantras in Rasoushadhi Nirmana.'' Int. Res. J. Pharm. 2019;10(9):35-38 <nowiki>http://dx.doi.org/10.7897/2230-8407.1009257</nowiki></ref> Thus yantras have various meanings based on the context of usage as follows<ref name=":3" />

Yantras, in Indian medicinal texts of [[Ayurveda (आयुर्वेदः)|Ayurveda]], refer to instruments used in surgery (shalya chiktsa). [[Rasashastra (रसशास्त्रम्)|Rasashastra]] texts of Ayurveda, mention the term Yantra to describe apparatuses used for preparation of Rasa drugs (rasa-aushadha-nirmana). The construction of yantras is described in the ancient literature with definite measurements and details for each arrangement. As per Rasasastra, metals and minerals needs to undergo specific procedures like shodhana, marana etc., before they could be administered into the body. All of this could be achieved with the help of yantras.<ref name=":9">Sen Aparna and S. Thara Lakshmi. ''A Review on the Yantras with special reference to commonly used Yantras in Rasoushadhi Nirmana.'' Int. Res. J. Pharm. 2019;10(9):35-38 <nowiki>http://dx.doi.org/10.7897/2230-8407.1009257</nowiki></ref> Thus yantras have various meanings based on the context of usage as follows<ref name=":3" />

# mechanical '''contrivances''' (machine or instrument) eg., kupa yantra (for drawing water)

# mechanical '''contrivances''' (machine or instrument) eg., kupa yantra (for drawing water)

There is a corroborative evidence of such works from Bhojadeva's treatise and was not merely imaginative fictions. Mechanical fountains were constructed as necessary adjuncts to all palaces is seen in casual descriptions of many dramas. In Kalidasa's Malavikagnimitra drama, fountains or jala-yantras are mentioned. <blockquote>बिन्दूत्क्षेपात्पिपासुः परिपतति शिखी भ्रान्तिमद्वारियन्त्रं bindūtkṣēpātpipāsuḥ paripatati śikhī bhrāntimadvāriyantraṁ (Malavikagnimitram. 2.12)<ref>Malavikagnimitra by Kalidasa ([https://sa.wikisource.org/wiki/%E0%A4%AE%E0%A4%BE%E0%A4%B2%E0%A4%B5%E0%A4%BF%E0%A4%95%E0%A4%BE%E0%A4%97%E0%A5%8D%E0%A4%A8%E0%A4%BF%E0%A4%AE%E0%A4%BF%E0%A4%A4%E0%A5%8D%E0%A4%B0%E0%A4%AE%E0%A5%8D/%E0%A4%A6%E0%A5%8D%E0%A4%B5%E0%A4%BF%E0%A4%A4%E0%A5%80%E0%A4%AF%E0%A5%8B%E0%A4%BD%E0%A4%99%E0%A5%8D%E0%A4%95%E0%A4%83 Dvitiyanka])</ref></blockquote>

There is a corroborative evidence of such works from Bhojadeva's treatise and was not merely imaginative fictions. Mechanical fountains were constructed as necessary adjuncts to all palaces is seen in casual descriptions of many dramas. In Kalidasa's Malavikagnimitra drama, fountains or jala-yantras are mentioned. <blockquote>बिन्दूत्क्षेपात्पिपासुः परिपतति शिखी भ्रान्तिमद्वारियन्त्रं bindūtkṣēpātpipāsuḥ paripatati śikhī bhrāntimadvāriyantraṁ (Malavikagnimitram. 2.12)<ref>Malavikagnimitra by Kalidasa ([https://sa.wikisource.org/wiki/%E0%A4%AE%E0%A4%BE%E0%A4%B2%E0%A4%B5%E0%A4%BF%E0%A4%95%E0%A4%BE%E0%A4%97%E0%A5%8D%E0%A4%A8%E0%A4%BF%E0%A4%AE%E0%A4%BF%E0%A4%A4%E0%A5%8D%E0%A4%B0%E0%A4%AE%E0%A5%8D/%E0%A4%A6%E0%A5%8D%E0%A4%B5%E0%A4%BF%E0%A4%A4%E0%A5%80%E0%A4%AF%E0%A5%8B%E0%A4%BD%E0%A4%99%E0%A5%8D%E0%A4%95%E0%A4%83 Dvitiyanka])</ref></blockquote>

== Yantra or Apparatus ==

== Contraption and Instruments in Ayurveda ==

Yantra in Ayurveda refer to surgical instruments on one hand and apparatuses or devices used to carry out various remedial processes on minerals and metals (or rasas) in a special branch of pharmacology in Ayurveda, termed as Rasashastra. Alchemical treatises of ancient India refer to various types of 'Yantras' or contraptions for different applications such as shodhana, jarana, marana, swedana etc. Yantras are commonly employed in the pharmaceutical preparation of rasoushadhis before they could be administered into the body.

 

 

=== Contraptions ===

Rasasastra deals with metallic, mineral and poisonous drugs. These drugs are pharmaceutically processed and rendered fit for internal administration. For the various processing of rasa uparasadi dhatus and for the preparation of medicines, specific apparatuses called ‘Yantras’ are needed. Metals and minerals are required to undergo certain processes like shodhana, jarana, marana, satwapatana etc before they could be administered into the body and all these processes could only be achieved with the help of yantras. In Rasasastra, ashta samskara of parade is reckoned of great importance in enhancing the potency of parada both from the therapeutical and alchemical point of view. Specific yantras are needed for each of these processes.<ref name=":9" />

== References ==

== References ==

[[Category:Shastras]]

[[Category:Shastras]]

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