INDEX 



311 



Deflection of columns. See Columns. 



Deformation defined, 2, 4. 



Designing of arches, 179. 



Designing of beams, 54. 



Diagram, bending moment and shear, 49. 



Douglas spruce, strength of, 292. 



Earth pressure (retaining walls), 205. 



Eccentric loading, 63. 



Elastic afterwork defined, 10. 



Elastic constants, relation between, 30. 



Elastic curve, 34, 71, 74, 77, 79, 81. 



Elastic law, 8. 



Elastic limit defined, 6, 226. 



Elastic resilience, 84, 226. 



Ellipse of inertia, 45. 



Ellipse of stress, 26. 



Elliptical plates, 138, 139. 



Elliptical shafts, 118. 



Elm, strength of, 290, 292. 



Empirical formulas (arches), 179. 



Equilibrium polygon (arches), 162, 164, 



165, 166, 167, 168. 

 Equivalent stress, 31. 

 Eulers formulas, 100, 101, 103. 

 European tests of timber, 289. 

 Expansion, cubical coefficient of, 29. 

 Expansion, linear coefficient of, 12. 



Factor of safety, 16. 



Fatigue of metals, 10. 



Fir, red, strength of, 290, 295, 296. 



Flat plates. See Plates. 



Flexure, common theory of, 34. 



Flexure, tests in, 221, 234, 262, 271, 275, 



280, 286, 290, 292, 295, 296. 

 Flow of material, 10. 

 Form of test piece, 13, 222, 244. 

 Foundation. See Retaining walls. 

 Fracture, character and appearance, 224. 

 Fragility, 11. 



Gordon's formula, 104. 

 Granite, strength of, 18. 

 Gum, strength of, 290, 292, 293. 

 Guns. See Thick hollow cylinders. 

 Gyration, radius of, 40. 



Hardening effect of overstrain, 11, 223. 

 IlKirtwood and sapwood, 283. 

 Helical spring, 119. 

 Hemlock, strength of, 290, 295, 296. 



Hemp rope, 302. 



Hickory, strength of, 290, 292, 293. 



Holding tension specimens, 222. 



Hollow cylinders. See Cylinders. 



Hollow spheres. See Spheres. 



Hooke's law, 6. 



Hooks, links, and springs : 



analysis for hooks and links, 145. 



bending strain in curved piece, 145. 



curvature, sharp, effect on strength, 

 154. 



curved piece of rectangular cross 

 section, 152. 



maximum moment in circular piece, 

 155. 



plane spiral springs, 157. 



simplification of formula, 148. 

 Hydraulic cement, 247, 248. 

 Hysteresis, 10. 



Impact and resilience, 84. 



Impact tests, 230. 



Indentation test, 289. 



Independent proof (columns), 101. 



Inertia, ellipse of, 45. 



Inertia, moment of. See Moment of 



inertia. 

 Influence line for bending moments. 86. 



reactions, 91. 



shear, 88. 



Initial internal stress, 12. 

 Iron, cast. See Cast iron. 

 Iron, wrought. See Wrought iron. 

 Iron and steel, 217. 



Iron and steel, strength of, at high tem- 

 peratures, 224. 

 Ironwood, strength of, 290. 



Johnson's parabolic formula, 106, 107. 



Johnson's straight-line formula, 108, 109. 



Cooper's modification of, 110. 



Keep's tests of cast iron, 234. 

 Kirkaldy's tests, 217, 234. 



Lamp's formulas, 130. 



Latent molecular action, 11. 



Lateral contraction, 14, 223. 



Law of continuity, 21. 



Least work, principle of, 96. 



Leather belting, 304. 



Lime, manufacture and properties, 247. 



