Emerging on the fringes of institutional religion, rooted in the Celtic world of Ireland and Wales and later intersecting with Gnostic currents such as those of the Cathars, Grail Christianity offers a radically distinct vision of Christian spiritual life. At its heart lies not a relic, but a question: What is the Grail?From Chrétien de Troyes' first vision of the Grail Castle to Wolfram von Eschenbach's Parzival, Meyer shows how the Grail legends preserve an esoteric Christian pat...

The unrivaled, definitive reference for almost 40 years, this classic work on explosives is now in its seventh, completely revised and updated edition.Some 500 monographic entries, arranged alphabetically, consider the physicochemical properties, production methods, and safe applications of over 120 explosive chemicals. In addition, 70 fuels, additives, and oxidizing agents are discussed as well as the corresponding test methods. Trade, company, and military short names are provided...