| Outlining spans, study of aesthetics in | 50 | | | |
| Overturning of piers, resistance to | 307 | | | |
| Paint-brush, accessibility to | 25 | | | |
| Painting, aesthetics in | 52 | 53 | | |
| Painting, inspection of | 290 | | | |
| Painting, investigations for | 9 | | | |
| Painting, specifications for | 259 | | | |
| Pairs, arrangement of members in | 21 | | | |
| Paltry brackets in elevated railroads | 99 | | | |
| Panel lengths, economic | 33 | | | |
| Paper on Elevated Railroads | 91 | | | |
| Parthenon | 43 | | | |
| Paved floors | 216 | | | |
| Pedestal-caps for elevated railroads | 93 | | | |
| Pedestals | 177 | | | |
| Pedestals, for cantilever bridges | 66 | | | |
| Pedestals for elevated railroads, sizes of | 181 | | | |
| Pedestals of towers in Halsted Street Lift-Bridge | 109 | | | |
| Percentage-curves for weights of cantilever bridges | 72 | 74 | 77 | 78 |
| Petit truss, superiority of | 19 | | | |
| Piece-work | 264 | | | |
| Pier centres, triangulation to | 325 | | | |
| Piers, designing of | 30 | | | |
| Pier-sinking | 315 | | | |
| Pier-sinking, methods of | 301 | | | |
| Pile foundations | 303 | | | |
| Pile piers | 314 | | | |
| Piles in concrete | 303 | | | |
| Piles, specifications for | 277 | | | |
| Pile-trestles | 273 | | | |
| Piling | 293 | | | |
| Pin-connected trusses for elevated railroads | 98 | | | |
| Pines | 298 | | | |
| Pinholes | 176 | | | |
| Pinholes, specifications for | 257 | | | |
| Pinion brackets | 193 | | | |
| Pinions for draw-spans | 125 | 201 | 205 | |
| Pin-metal | 251 | | | |
| Pin-plates | 175 | 233 | | |
| Pin-proportioning | 170 | | | |
| Pins, bending moments on | 157 | | | |
| Pins, specifications for | 258 | | | |
| Pipes, removal of | 291 | | | |
| Pivot-piers, drainage of | 128 | | | |
| Placing concrete under water | 293 | | | |