The Biotic World and Man

periodicals all over the world. Before further advance in tuberculosis research can be made, it is necessary to summarize the results already achieved; this is one of the aims of this book. Another of my objectives is to point out unsolved problems in the bacteriology of tuberculosis and to indicate recently developed experimental methods for the study of the tubercle bacilli." For the young scientist embarking on tuberculosis research and without a vast background of experience, this book should be invaluable as a good summary of the field of experimental and diagnostic tuberculosis. The faculties of bacteriology departments in our colleges and universities should find this an excellent lecture and reference guide. Needless to say, I enthusiastically recommend this book for the library of all bacteriologists.