"The purpose of this manual is to provide a practical treatment of elementary mathematics, and a discussion with illustrative examples of the mathematics involved in actual shop work. Chapters 2 through 8 explain common and decimal fractions, ratio, proportion, percentage, square roots, algebra, plane and solid figures, trigonometry, and mechanics. Chapters 9 through 12 discuss the mathematics of immediate concern to the machinist, sheetmetal worker, electrician, and carpenter. Various miscellaneous formulas and tables, and answers to exercise problems, may be found in the appendix."--Page 1.

Includes Changes No.1, dated 18 February, 1952. "3 May 1945"--Title page.

General --Common and decimal fractions -- Common fractions -- Decimal fractions -- Ratio, proportion, and percentage -- Square roots -- Algebra -- Plane and solid figures -- Plane figures -- Solid figures -- Trigonometry -- Mechanics -- Mathematics for the machinist -- Cutting speeds and feeds -- Screw threads and thread cutting -- Tapers -- The index head and indexing operations -- Mathematics for the sheet-metal worker -- Mathematics for the electrician -- Introduction -- Series and parallel circuits -- Work, power, and efficiency -- Mathematics for the carpenter -- Lumber terms and dimensions -- Carpenter's square -- Appendix I Miscellaneous formulas -- Appendix II Miscellaneous tables -- Appendix III Answers to problems -- Appendix IV List of references.