606 



INDEX 



Seasons, the cause of, 281-288; 

 lag of, 207. 



Separator, cream, 529-531; advan- 

 tages of, 532. 



Septic tank, 510; Imhoff, 513; 

 sludge from, 514. 



Settling tank, 484. 



Sewage, 608; disposal of, 509; oxi- 

 dation of, 514; liquefaction of, 

 512; summary concerning, 517. 



Sewing machine, earliest, 521 ; 

 classes of, 522; classes of lock 

 stitch, 524; exercise upon, 527. 



Shorts, 370. 



Showers, local, 235; to foresee 

 them, 236; how they grow, 238; 

 thunder showers, 240. 



Shuttle, oscillating, 525; vibrating, 

 525. 



Side-icing refrigerator, 155. 



Side-feed furnace, 98. 



Siphon, the, 506; barometer, 186; 

 flushing tank, 507. 



Siphoning of traps, 506. 



Slow oxidation, 345. 



Sludge, its disposal, 514. 



Small pox, 428; and vaccination, 

 430. 



Smudge pots, 208. 



Snow, 234; measurement of, 195; 

 of a passing low, 264. 



Soil, nature of, 402; water, 452; 

 drainage through, 458; air, 460; 

 temperature, 462; thermom- 

 eter, 462; conserving moisture of, 

 465; increasing moisture capacity 

 of, 467; humus in, 409; acidity 

 of, 411; bacteria, 401. 



Soil air, 460; movements of, 461; 

 causes of" movements, 462-465. 



Solstice, summer, 286; winter, 287. 



Spirilla, 400. 



Spirits of hartshorn, 165. 



Sporangium, 386. 



Spore production, 386. 



Starch, 349. 



Steam engine, earliest, 566; com- 

 pared with horse as a motor, 553 ; 

 importance of, 565; source of 

 power of, 566; Newcomen air- 

 steam, 567; Watt's, 568; the 

 modern, 572. 



Steam heating, principles of, 131 ; 

 equipment for, 132; contrasted 



with hot water, 132; vacuum 

 system, 140. 



Sterilization, 419. 



Stokers, mechanical, 99. 



Storms, local, 235; hail, 242; gen- 

 eral, 248, 255, effect on barome- 

 ter, 257. 



Stove, Franklin's, 75; early cook- 

 ing, 147; range, 149; gasoline, 

 149; gas, 151; jacketed, 331. 



Substratum, 386. 



Sucrose, 349. 



Suction, denned, 341; pump, 476; 

 system of ventilation, 336; stroke 

 of the gasoline engine, 577. 



Sugar, 375; from beets, 376; from 

 cane, 376; refining of, 377. 



Sulphite, sodium, 367. 



Sulphur and copper, union of, 79. 



Sun, migration of, 277; altitude 

 and heating effect, 281; heating 

 effects, 284-286; source of all 

 energy, 562. 



Sunshine, and health, 300; effect 

 on disease germs, 415, 300; 

 average amount, 301. 



Syrup, corn, 373; refiner's, 373. 



Tank, septic, 510; flushing, 507. ^ 



Temperature, 12; fixed points in 

 nature, 13; of steam arising from 

 water, 17; vs. pressure, 138; of 

 steam in a vacuum system, 142; 

 of steam in a pressure boiler, 138; 

 cooking, 152; control of bodily, 

 317; effect of upon metabolism, 

 381; ideal of indoor air, 319; 

 thermostat control of, 335; meas- 

 urement of, 196; obtaining 

 records of, 199; facts about, 205- 

 207; as affected by wind, 252; 

 how it changes during a low, 

 262; soil, 462; and bacteria, 414. 



Tempering coil, 334. 



Thermograph, 199. 



Thermometer, 12; principle of, 13; 

 Fahrenheit, 14; centigrade, 14; 

 "freezing point," 15; "boiling 

 point," 15; ordinary, 197; maxi- 

 mum and minimum, 197; re- 

 cording, 199 need of; testing, 

 200; need of sheltering, 201; soil, 

 462. 



Thermostat, 335. 



