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His work known as Rasaratnakara contains descriptions of alchemical processes and preparations of mercurial compounds. He also wrote about the methods for extraction of metals like gold, silver, tin and copper from their ores and their purification.<ref name=":0" /> His book, Rasaratnakara, is indeed a survey of metallurgy and alchemy as it existed in ancient Bharata.<ref name=":3" />

His work known as Rasaratnakara contains descriptions of alchemical processes and preparations of mercurial compounds. He also wrote about the methods for extraction of metals like gold, silver, tin and copper from their ores and their purification.<ref name=":0" /> His book, Rasaratnakara, is indeed a survey of metallurgy and alchemy as it existed in ancient Bharata.<ref name=":3" />

=== Varah Mihir ===

=== वराहमिहिरः ॥ Varahamihira ===

Varah mihir's contribution is also found in astronomy. He has also worked in the fields of earth science, geology and environment. He was the first person to tell that termites and underground plants are the presence of life, he has also written about earthquakes and its cases. He has also tried to join the effects of planets, of earthquake, movement beneath the ocean, underground water and behavior of animals.<ref name=":0">Vijnana - Level B ([https://nios.ac.in/media/documents/OBE_indian_knowledge_tradition/Level_B/Vijnana-B_English_OBE/Science-B_eng_Ch-10.pdf Chapter 10]), Open Basic Education Programme (Bharatiya Jnana Parampara), Noida: National Institute of Open Schooling.</ref>

Varahamihira's contribution in astronomy has already been mentioned. He also had astonishing knowledge of a variety of subjects like hydrology, meteorology, astrology, seismology, etc. His work in the fields of earth science, geology, environment, etc is reflected in his magnum opus Brhat Samhita.<ref name=":3" />

 

He was the first to tell that termites and underground plants reflect presence of life. He also writes about earthquakes and its cases. And tried to relate the effects of planets, of earthquake, movement beneath the ocean, underground water and behavior of animals.<ref name=":0">Vijnana - Level B ([https://nios.ac.in/media/documents/OBE_indian_knowledge_tradition/Level_B/Vijnana-B_English_OBE/Science-B_eng_Ch-10.pdf Chapter 10]), Open Basic Education Programme (Bharatiya Jnana Parampara), Noida: National Institute of Open Schooling.</ref>

== References ==

== References ==

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