| "A" truss-bridges, advantages of | 6 | | |
| "A" truss-bridges, history and description of | 5 | | |
| Abandoned drawings | 342 | | |
| Abuse of man-power machinery | 128 | | |
| Abutting ends | 174 | | |
| Abutting ends, workmanship on | 257 | | |
| Accessibility to paint-brush | 25 | | |
| Accidents, responsibility for | 263 | | |
| Accuracy in base-line measurements | 317 | 318 | |
| Accuracy in punching | 254 | 287 | |
| Adherence to principles in designing | 4 | | |
| Adjustable members | 149 | 171 | |
| Adjustable rods for draw-spans | 192 | | |
| Adjustment of draw-spans | 128 | | |
| Adjustment of rollers for draw-spans | 196 | | |
| Adoption of subpunching and reaming | 9 | | |
| Advantages and disadvantages of high and low bridges | 119 | | |
| Advantages of combined bridges | 133 | | |
| Advantages of lift-bridges | 113 | | |
| Advantages of medium steel | 8 | | |
| Advantages of soft steel | 8 | | |
| Advantages of the arch | 79 | | |
| AEsthetic reform in bridge-building | 45 | | |
| AEsthetic reform in bridge-building, opposition to | 45 | | |
| AEsthetics in cantilever bridges | 61 | 62 | |
| AEsthetics in design | 39 | | |
| AEsthetics in design, fundamental principle of | 47 | | |
| AEsthetics in East Omaha draw-span | 48 | | |
| AEsthetics in general engineering constructions | 42 | | |
| AEsthetics in painting | 52 | 53 | |
| AEsthetics in pier designing | 53 | 54 | |
| Alteration of drawings | 243 | 263 | 342 |
| Ambiguity in stresses in ordinary draw-spans | 121 | | |
| Ambiguity in trusses | 219 | | |