This vintage 1946 edition of Five-Figure Logarithmic and Other Tables by Frank Castle is a compact mathematical reference guide published by The Macmillan Company of Canada. Produced before electronic calculators became commonplace, the book contains extensive five-figure logarithmic tables, antilogarithms, trigonometric functions, logarithmic trigonometric tables, hyperbolic functions, square and cube roots, reciprocals, powers, circle measurements, angle conversions, and other engineering and scientific reference data. Designed for students, engineers, surveyors, mathematicians, and technical professionals, it served as an essential computational tool for performing complex calculations by hand. This copy remains complete and readable, showing moderate wear to the covers, age toning to the pages, and handwritten ownership notes on the front endpaper, making it an interesting piece of mathematical and scientific history from the pre-calculator era.