This excellent reference book should be of great value to the clinician, the research worker, and the student. In The Design of Experiments, the great English statistician, R. A. Fisher remarks, "The statistician cannot excuse himself from the duty of getting his head clear on the principles of scientific reference, but equally no other thinking man can avoid a like obligation." Dr. Mainland's book is an exposition on this theme.
It is quite unnecessary for the reader to be familiar with higher mathematics and the derivation of formulas, in order to understand and profit by this book. The first eight chapters are devoted to an exhaustive discussion of the nature of research, the questions which should be asked and answered before an experiment or survey is undertaken, and the precautions which should be observed in interpreting results. The next two chapters deal in an extremely practical way with the important