Avesta of particular manuscripts. A pre-Sasanian history of the Avesta, if it had one, is in the realm of legend and myth. The oldest surviving versions of these tales are found in the ninth to 11th century texts of Zoroastrian tradition (i.e. in the so-called "Pahlavi books"). The legends run as follows: The twenty-one "nask"s ("books") of the Avesta were created by Ahura Mazda and brought by Zoroaster to his patron Vishtaspa ("Denkard" 4A, 3A). Supposedly, Vishtaspa ("Dk" 3A) or another Kayanian, Daray ("Dk" 4B), then had two copies made, one of which was stored in the treasury, and the other
The Inventions, Researches, and Writings of Nikola Tesla they are there is life. The Inventions, Researches, and Writings of Nikola Tesla The Inventions, Researches and Writings of Nikola Tesla is a book compiled and edited by Thomas Commerford Martin detailing the work of Nikola Tesla up to 1893. The book is a comprehensive compilation of Tesla's early work with many illustrations. Written in 1893, the book is a record of Tesla's pioneering activities, research, and works. Tesla is recognized as one of the foremost electrical researchers and inventors. At the time of publication, the book was the "bible" of every electrical engineer practicing the profession. The book contains