The passage provides reviews of several scientific and mathematical publications. "American Men of Science" is a comprehensive directory of notable scientists and mathematicians from the United States and Canada, detailing their achievements and contributions. The book is praised for its clarity and extensive content, though it is noted that such a resource is lacking in British publications. "Elementary Statistics" by Prof. Hyman Levy and E. E. Preidel covers basic statistical concepts with clear explanations and examples, though the authors' use of certain terms like "fictitious average" is criticized. "Introduction to Differential Equations" by S. L. Green is recommended for students in arts, science, and engineering, offering a clear and well-structured treatment of the subject. "The Theory of Measure in Arithmetical Semi-Groups" by Aurel Wintner delves into prime-number theory, though it is noted that the book is dense and assumes prior knowledge, making it less accessible to general readers.The passage provides reviews of several scientific and mathematical publications. "American Men of Science" is a comprehensive directory of notable scientists and mathematicians from the United States and Canada, detailing their achievements and contributions. The book is praised for its clarity and extensive content, though it is noted that such a resource is lacking in British publications. "Elementary Statistics" by Prof. Hyman Levy and E. E. Preidel covers basic statistical concepts with clear explanations and examples, though the authors' use of certain terms like "fictitious average" is criticized. "Introduction to Differential Equations" by S. L. Green is recommended for students in arts, science, and engineering, offering a clear and well-structured treatment of the subject. "The Theory of Measure in Arithmetical Semi-Groups" by Aurel Wintner delves into prime-number theory, though it is noted that the book is dense and assumes prior knowledge, making it less accessible to general readers.