PART A: CALCULATION AND DESIGN ...(1) The Spring as a Beam ...(2) The Deflection of Beams ...(3) Stress and Strain - Elasticity ...(4) Development of the Formula for Deflection ...(5) The Circular Arc ...(6) Practical Considerations of the Theoretical Aspect ...(7) The Present Formulae - Semi-Elliptic Springs ...(8) The Present Formulae - Springs Other Than Semi-Elliptic ...(9) Formulae of Other Authorities ...(10) Remarks on Steel ...(11) Formulae for Spring Testing ...(12) Tests on Spring Steel ...(13) "Nip" and "Pull" ...(14) Plate Thicknesses ...(15) Lengths of Plates ...(16) Finish of Plate Ends ...(17) The Stress Effect of Center Fasteners ...(18) A Study in Skin Stresses ...(19) Stress and Bending Moment Diagrams ...(20) Resiliency and Spring Weights ...(21) Periodicity ...(22) Examples of Deflection Calculations ...(23) Remarks on Spring Designing ...(24) Aids to Spring Calculations ...PART B: MANUFACTURE (reprint of an earlier work on spring making)