'Brihat-Samhita' is a
6th century Sanskrit encyclopedia by
Varahamihira of wide ranging subjects of human interest, including
astrology, planetary movements,
eclipses, rainfall, clouds,
architecture, growth of crops, manufacture of perfume, matrimony, domestic relations,
gems,
pearls, and rituals. The volume expounds on
gemstone evaluation criterion found in the
Garuda Purana, and elaborates on the sacred
Nine Pearls from the same text. It contains 106 chapters and is known as the "great compilation".
The importance of Brihadsamhita lies in the classification of the different types of comets/meteors etc and also in the metereological observations.It throws light on some ancient practices like watching the migratory birds for coming of the monsoons which brings the ships and the bounty and also the rainy season and fertility of soil.India being a agricultural economy and economy based on trades through searoutes(via the trade winds)depended upon such observations for her yearly planning .