Donald W. Hurd writings (10.2.7)

The collection consists of two notebooks compiled by Donald W. Hurd titled "Elements of Mechanics, Strength of Materials, Structures" (circa 1945) and "Formulas and Data on Engineering, Mathematics, Physics, and General Engineering" (undated). The notebooks, 8x6 and 5x3 respectively, contain formulas, diagrams, and explanations for subjects taught by Hurd including algebra, calculus, mechanical engineering, and trigonometry.