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154 custom some of these hymns were chanted in some forms of sacrifice, and a collection of these select hymns, set to music, was called the Sama Veda. Again, special sacrificial formulas were required for the use of the officiating priests, and these formulas were separately collected and known as the Yajur Veda. The Atharva Veda was the last one. The study of the Vedas which were supposed to embody alj the learning which it was given to man to acquire, was considered the most important duty and the most cherished heritage of all Hindus.

Vyakarana.—Grammar