THE INDEX 



535 



Safety, factor of, in structures, 



Saltpeter, use in gunpowder, 174 



Sand (see also Aggregate): for 

 road building, 210, 211; illus- 

 trations, 134, 135; Ottawa, 135; 

 "sharp," 132; test for use in 

 concrete, 133 



Sanderad, 171 



Sanitation, 384-400; danger from 

 well drainage, 301; drainage in 

 relation to, 269, 384, 385; need 

 of, 384 ff . ; system for nouses, 

 332?.; system of protecting 

 wells, 361 ff. 



Sap wood, 107, 112 



Sawing of lumber: quarter, no; 

 straight or slash, no 



Screws, 163; American Screw 

 Gauge Table, 163 



vSecond, 20, 23 



Second-foot, 22 



Sections, 16, 91 ff.; irregular, 94; 

 method of numbering, 85 f. 



Selma, Ala., rainfall statistics for, 



Septic tanks, 388 ff. ; absorption 

 method of disposing of effluent 

 from, 391 ff.; cleaning, 397; 

 construction of, 397 ff.; dia- 

 gram of, 396; disposal of 

 effluent from, 390; filtration 

 method of disposing of effluent 

 from, 393; form of, 393 ff.; 

 location of, 395, 397; open 

 ditch as outlet for, 390 f . ; size 

 of, 395; tile drains as outlet 

 for, 390 



Shadows, short, direction deter- 

 mined by, 24 



Shaft, 466 



Shafting, 466 ff . 



Shear, 64 f., 67, 68, 69 



Shellac, 171, 318 ff. 



Shingles: asbestos, 166; asphalt, 

 165 f. ; covering capacity of 

 wooden, 315; slate, 166; tile, 

 166; tin and galvanized, 166; 

 wood, 164 



Shiplap, 118, 121, 159 



Siding, 159 f.; metal 160; stucco, 

 159; wood, 159 



Signature, correct methods for, 6 



Silage, 343, 344 



Silos, 342 ff., 378; bursting strain 

 of, 344; construction of, at 

 home, 344 f . ; dimensions of, 343 

 f. ; effect of freezing on, 344; 

 foundation for, 345 f . ; funda- 

 mental requirements of, 342; 

 materials of which constructed, 

 346 ff.; plans _ for, 346, 347, 

 348; reinforcing layout for 

 concrete (ill.), 345 



Singletree, 479 



Sink, 330, 375 



Sisal hemp, 30 



Skid ways, 108 



Slab, in 



Sleeve valve, 515 



Slip knot, 54 f. 



Slip scraper (ill.), 278 



Smith, L. J., 338 



Snakeholing, 189, 190 (ill.), 191 



Soil: weight per cubic yard, 304; 

 weight various soils can sup- 

 port, 304 



Solar day, mean, 23 



Spark plugs (ill.), 508 



Spatter finish for concrete, 154, 



J 55 

 Specific gravity, 465 



Sphere, formula for area of, 1 7 



Spike knot, 112 



Spliced eye, 46 ff . 



Splices: long, 53 ff.; short, 50 ff.; 



spliced eye, 46 ff . 

 Springs, 360 



Spruce, 106, 120, 123, 126 

 Stains, 170 

 Stair well (ill.), 309 

 Stairs, 333 

 Stairway with rabbited risers 



(ill.), 308 

 Stake and rider, 221 

 Staples, 238 

 Station, 9 



Steam engines, 482 f. 

 Steam heat, 416 

 Stewart, John T., 282 

 Stone, 158; for road building, 



206 f. 

 vStorage battery, 502 ff . ; Edison 



cell, 504; hydrometer test for, 



503 

 Stoves, 401, 407 f. 



Strain, 69 



Stress: definition, 63; synony- 



