Frequency curves, correlation, and sampling form a subject with much still to be done, despite recent progress. The book by W. Palin Elderton shows that actuarial statistics can be studied similarly to those of biology, anthropology, or sociology. The advantages of any curve system depend on simplicity of formulas and the number of observation classes they can handle. The author emphasizes the need for simple, reliable methods to determine statistical constants. The third edition includes revised chapters on standard errors, goodness of fit tests, and the correlation ratio. The notation for moments is retained, with the adjusted statistical moment equated to the theoretical moment in practical curve-fitting. The Dictionary of Scientific Terms by C. M. Beadnell is a non-technical dictionary for the layman, focusing on biological terms. It is accurate, well-illustrated, and well-priced. The Cultivation of Mushrooms by Dr. W. F. Bewley and J. Harnett is a revised and enlarged second edition, providing comprehensive information on mushroom cultivation, diseases, pests, and even cooking. The book is well-written and illustrated. Organic Chemistry by Dr. Frederick Prescott and Dudley Ridge is a textbook for science and medical students, covering topics relevant to second-year medical students and general B.Sc. students. It includes sections on carbohydrates, proteins, enzymes, and modern theories of valency.Frequency curves, correlation, and sampling form a subject with much still to be done, despite recent progress. The book by W. Palin Elderton shows that actuarial statistics can be studied similarly to those of biology, anthropology, or sociology. The advantages of any curve system depend on simplicity of formulas and the number of observation classes they can handle. The author emphasizes the need for simple, reliable methods to determine statistical constants. The third edition includes revised chapters on standard errors, goodness of fit tests, and the correlation ratio. The notation for moments is retained, with the adjusted statistical moment equated to the theoretical moment in practical curve-fitting. The Dictionary of Scientific Terms by C. M. Beadnell is a non-technical dictionary for the layman, focusing on biological terms. It is accurate, well-illustrated, and well-priced. The Cultivation of Mushrooms by Dr. W. F. Bewley and J. Harnett is a revised and enlarged second edition, providing comprehensive information on mushroom cultivation, diseases, pests, and even cooking. The book is well-written and illustrated. Organic Chemistry by Dr. Frederick Prescott and Dudley Ridge is a textbook for science and medical students, covering topics relevant to second-year medical students and general B.Sc. students. It includes sections on carbohydrates, proteins, enzymes, and modern theories of valency.