Plane and Spherical Trigonometry with tables by George Wentworth and David Smith Ginn and Company 1915 S cix in very good vintage condition .Own a classic piece of early 20th-century mathematical education history. Up for sale is an authentic 1915 hardcover edition of Plane and Spherical Trigonometry (with Tables), authored by prominent educators George Wentworth and David Eugene Smith, and published by Ginn and Company. George Wentworth’s textbooks dominated American mathematical instruction for a generation, and his collaboration with renowned math historian David Eugene Smith produced some of the most widely respected high school and collegiate texts of the era. Complete with its vital historical logarithmic and trigonometric tables, this volume features classic period buckram or cloth binding, traditional typography, and diagram-filled pages that capture the rigorous academic standards of the 1910s.A must-have acquisition for collectors of antique scientific texts, historians of mathematics, educators, and vintage library decorators. Book Details Title: Plane and Spherical Trigonometry with Tables Authors: George Wentworth and David Eugene Smith Publisher: Ginn and Company (Boston, New York, Chicago) Publication Year: 1915 Format: Antique Hardcover with integrated mathematical tables Condition: Very good vintage condition. Well-preserved with clean pages, a tight binding, and honest historic charm appropriate for an educational text over a century old.