In the early 1970s the redoubtable old occultist William G. Gray bicycled from his Gloucestershire home to the Rollright stone circle in Oxfordshire on a clear and full-mooned summer night. The visionary experiences he encountered on that night and in other similar visits resulted in the writing of this book, originally published by Helios Books in 1975 and now a classic among pagan and craft traditions. The text of the ritual is given in full, along with a discussion of its pattern and purpose. The Rollright Ritual is a powerful initiatory rite for attuning oneself to a personal and communal...

A previously unpublished work by the late W.G. Gray, comprising a course in modern Hermetic ritual magic and practical Qabalah.

Thermodynamically constrained averaging theory provides a consistent method for upscaling conservation and thermodynamic equations for application in the study of porous medium systems. The method provides dynamic equations for phases, interfaces, and common curves that are closely based on insights from the entropy inequality.All larger scale variables in the equations are explicitly defined in terms of their microscale precursors, facilitating the determination of important parameters and macroscale state equations based on microscale experimental and computational analysis.The method...

Seasonal rites are as old as the hills on which they were once practised by most of humanity. Periodically, in accordance with the natural tides of nature and the times indicated by the sun and moon, people came together to make dedicated representations of the things that bound them closest to the cosmic wheel of life. In this absorbing work, William G. Gray demonstrates the continuing relevance of such practices in modern society. The actions of the rites are performed in a circle which symbolises the cosmic course, the magical practices consisting of music, movement, meditation and...

As an "omniscient and obnoxious" teenager in 1969, Alan Richardson wrote to the occult author William G. Gray in pursuit of instant magical enlightenment. It was the beginning of a correspondence lasting many years in which Gray generously shared his magical knowledge and experience.

This textbook presents an understanding of how basic physical descriptions can be translated into mathematical analogues that provide an opportunity to investigate environmental processes. Examples come from a range of hydrologic, atmospheric, and geophysical problems. The emphasis is on simple examples and calculations that add to understanding. The book provides a sense for the meaning of mathematical expressions, a physical feel for their relations to processes, and confidence in working with mathematical solutions. The goal of this book, in essence, is to present the timeless basic...

This unitary resource sets out the derivation of conservation, thermodynamic, and evolution equations used in modeling multiphase porous media systems. It includes detailed, multiscale applications and a forward-looking discussion of open research issues.