| Some Disputed Points in Railway-Bridge Designing | 265 | |
| Spacing of arches | 85 | |
| Spacing of girders for draw-spans | 189 | |
| Spacing of girders in railroad bridges | 143 | |
| Spacing of girders in trestles | 87 | |
| Spacing of I-strut angles | 177 | |
| Spacing of joists in highway bridges | 214 | |
| Spacing of rivets at ends of cover-plates | 109 | |
| Spacing of stringers in railroad bridges | 143 | |
| Spacing of ties in elevated railroads | 102 | |
| Spacing of tracks in railroad bridges | 143 | |
| Spacing of trusses in railroad bridges | 144 | |
| Spacing-rings for rollers of draw-spans | 197 | |
| Span lengths, economic | 33 | 34 |
| Span lengths for elevated railroads | 92 | 93 |
| Span lengths for trestles | 86 | 180 |
| Special investigations concerning cantilever bridges | 69 | |
| Specialist, duties of | 3 | |
| Specialist, necessity for | 3 | |
| Specifications, filing of | 344 | 345 |
| Specifications for cast iron | 252 | |
| Specifications for cast steel | 253 | |
| Specifications for highway bridges and viaducts | 213 | |
| Specifications for highway draw-spans | 237 | |
| Specifications for materials | 243 | |
| Specifications for piles | 277 | |
| Specifications for railroad draw-spans | 182 | |
| Specifications for railroad structures | 141 | |
| Specifications for timber trestles | 270 | |
| Specifications for wrought iron | 252 | |
| Specifications, spirit of | 264 | |
| Speed of testing-machine | 247 | |
| Spirit of the specifications | 264 | |
| Splices in columns | 90 | 180 |
| Splices in flanges of plate girders | 167 | |
| Splices in members of draw-spans | 192 | |
| Splices in webs of plate girders | 166 | |
| Stamping-hammers | 298 | |
| Standard specifications for highway bridges | 131 | |
| Star-struts, objections to | 28 | |
| Star-struts, tests of | 28 | |
| Station-houses for elevated railroads | 102 | |
| Stay-plates | 174 | 232 |
| Steam-engines for draw-spans | 120 | 201 |
| Steel buildings | 331 | |
| Steel caissons | 309 | |