Bessel functions are associated with a wide range of problems in important areas of mathematical physics. Bessel function theory is applied to problems of acoustics, radio physics, hydrodynamics, and atomic and nuclear physics. Bessel Functions and Their Applications consists of two parts. In Part One, the author presents a clear and rigorous introduction to the theory of Bessel functions. Part Two is devoted to the application of Bessel functions to physical problems, particularly in the mechanics of solids and heat transfer. This volume was designed for engineers and researchers interested in the applications of the theory, and as such, it provides an indispensable source of reference.