There are two primary versions or Samhitas of the Yajurveda: Shukla (white) and Krishna (black). Both contain the verses necessary for rituals, but the Krishna Yajurveda includes the Brahmana prose discussions mixed within the Samhita, while the Shukla Yajurveda has separately a Brahmana text, the Shatapatha Brahmana. Shukla Yajurveda The Shukla Yajurveda is represented by the Vajasaneyi Samhita. The name Vajasaneyi is derived from Vajasaneya, patronymic of sage Yajnavalkya, an authority and according to tradition, founder of the Vajasaneyi branch. The Vajasaneyi Samhita has forty chapters or adhyayas, containing the formulas used with the following rituals: 1.-2.: New and Full Moon sacrifices 3.: Agnihotra 4.-8.: Somayajna 9.-10.: Vajapeya and Rajasuya, two modifications of the Soma sacrifice 11.-18.: construction of altars and hearths, especially the Agnicayana 19.-21.: Sautramani, a ritual originally counteracting the effects of excessive Soma-drinking 22.-25.: Ashvamedha 26.-29.: supplementary formulas for various rituals 30.-31.: Purushamedha 32.-34.: Sarvamedha 35.: Pitriyajna 36.-39.: Pravargya 40.: the final adhyaya is the famous Isha Upanishad -wikipedia