Title: Matter, Gravity and Spin
Description: Though this book is not necessarily for the layman, "Matter, Gravity and Spin" presents the concepts of general relativity in lucid form for those who have an understanding of the mathematics involved.
   Dr Gall's approach allows for the exact treatment of matter and spin, as well as gravity. Previously, only gravity could be so treated. The problems faced by scientists at the turn of the century (19th --> 20th) concerning the concepts of matter and distance are briefly reviewed to recall the origins of the theory of relativity. The author then shows how modern developments require modification of our ideas on this subject.
   The mathematical basis of general relativity is discussed in the simplest fashion possible. The derived (pure) field equations are then solved under different conditions of matter, gravity and spin. The resulting solutions are used to define the refractive index of an isotropic material medium. Geodesic equations of motion are defined for each solution. Proposals are then made for the development of these ideas.
   As suggested in the introduction, this book will give new insights about "physical reality".
Subjects: General relativity (Physics), Matter, Gravitation