The Bion Experiments, published in a limited German edition in 1938 and now available in English for the first time, represents a cornerstone in Reich's scientific development. The work documents a series of experiments conducted in Oslo in 1936-37 in which Reich applied the formula of tension'charge'discharge'relaxation, derived from his research on the function of the orgasm, to the microscopic biological world, thereby opening a route to an understanding of the origin of life. This work is divided into twoparts: the first, a detailed report on the experiments; the second, Reich's conclusions and an exposition of his research method. The Bion Experiments provides a unique insight into Reich's scientific method, and makes available the experimental material essential to understanding his later work with cancer and orgone biophysics.