(6) Contents of Āpastambaśrautasūtra:
- Praśnas 1-4. Darśapūrṇamāsas, Yājamāna
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- Agnyādheya (Establishment of fires)
- 5.26-79 Punarādheya (Re-establishment of fires).
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- Agnihotra
- 6.16-31. Agnyupasthāna (Praise of Agni).
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- Nirūdhapasubandha (Independent Animal sacrifices).
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- Cāturmāsya-sacrifices (Four-mounthly-sacrifices).
- 8.1-4: Vaiśvadevaparvan.
- 8.5-8: Vauṇapraghāsaparvan.
- 8.9-19: Sākamedhaparvan.
- 8.20-22: Śunāsīrīyaparvan.
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- Prāyaścittis (Expiations).
- 10-13. Agniṣṭoma.
- 14.1-12. Ukthya, Ṣodasin, Atirātra, Aptoryāma, Aikādaśīna.
- 14.13-15. Cāturhotr̥, Pañcahotr̥, Ṣaḍḍhotr̥, Saptahotr̥,etc.
- 15 Pravargya.
- 16-17. Agnicayana (Fire-altar-building-rite).
- 18.1-7. Vājapeya.
- 18.8-22. Rājasūya.
- 19.1-10. Sautrāmaṇi (19.5-10 Kaukilī-Sautrāmaṇī)
- 19.11-15. Sāvitra, Nāciketa, Cāturhotra, Vaiśvasr̥ja (Agni) (Fire altar-building-rites).
- 19.16-17. Kāmya Pasus (optional animal sacrifices).
- 19.18-24. Kāmya Iṣṭis (optional Iṣṭis).
- 20.1-23. Aśvamedha (Horse-sacrifice).
- 20.24-25. Puruṣamedha (Man-sacrifice), Sarvamedha (All-sacrifice).
- 21.1-10. Dvadaśāha (Twelve-day-Soma-sacrifice).
- 21.15-23. Gavāmayana (YEAR-LONG-sacrificial-session).
- 21.24-25. Utsargiṇām ayanam (-sacrificial session).
- 22.1-13. Ekāhas (One-day-soma-sacrifices).
- 22.14-24. Ahīna-sacrifices.
- 22.25-28. Sava (-sacrifices). Sattras (sacrificial sessions).
- 24.1-4. Paribhāṣās (General Rules).
- 24.5-10. Pravaras (list of important sages in various families).
- 24.11-14. Hautraka (the Duties of the Hotr̥-priest).