In his preface to the third edition of "Fundamentals of Immunology," the author states the purpose is to introduce the science of immunity primarily to students and research workers. The book accomplishes this purpose. It is concerned, however, much more with treatment of the chemical than with the biological aspects of immunity. This is unfortunate. The chemical approach appears to be the key which will undoubtedly give us the truth concerning biological mechanisms, but flexibility in thinking, in learning, and in investigation of life processes must be held in areas where chemical precision cannot yet be applied. Thus the history, variability, theory, and techniques which have formed the foundation for our present understanding of biological systems must remain important in shaping our thinking for future investigation and for progress. In the light of this the considerations of complement, the hypersensitive reactions, and phagocytosis are perhaps incomplete.
The chapters on antigens,