INDEX 



All references are to pages. 



Absolute humidity, 158, 219; Table 



of, 220. 

 Acetylene, 47 ; generators, 47 ; cost 



of, 48; illuminant for vehicles, 



49; danger from, 50; use for 



heating, 103. 



Aeration of the soil, 465. 

 Air, constituents of, 80, 311 ; -duct, 



124; within refrigerator, 160; 



gure, 311; effect of breathing, 

 12; vitiated, 312, 327; ideal in- 

 door, 319, 307; effect of vitiated, 

 327; weight of, 179; weighing, 

 exp., 180; pressure of, 181; 

 moisture in, 212-235; soil, 460- 

 465. 



Air blast, 97. 



Alcohol, how produced, 392; dis- 

 tillation of, 20, 391; boiling 

 point of, 19. 



Ammonia, 165 ; properties of , 163; 

 from proteins, 404, 350; test of 

 proteins, 350; boiling point and 

 pressure of, 165. 



Animal life, dependent upon cli- 

 mate, 290. 



Antenaria, 387. 



Anthrax, 423; symptoms, 424; pre- 

 vention and cure, 425; vaccine, 

 427. 



Antiseptic, 415. 



Antitoxine, 433. 



Arc lamp, 52. 



Archimedes' principle, 116, 117. 



Aspergillus, 386. 



Atmospheric pressure, measure- 

 ment of, 183; variation with alti- 

 tude, 190. 



Attenuated, 426. 



Atwater, Dr., 351, 352. 



Automatic cut-off, 508. 



Babcock test, for fat, 360. 

 Bacilli, 400; anthrax, 424; diph- 



theria, 431; typhoid, 439; in- 

 fluenza, 440; tuberculosis, 442. 



Bacteria, 383, 396; forms of, 399; 

 where found, 400; soil, 401; and 

 nitrogen in the soil, 403; nitrify- 

 ing, 404; nitrogen fixing, 405; 

 nodule, 405; denitrifying, 408; 

 aerobic, 408; anaerobic, 408; and 

 soil leaching, 410; and soil acid- 

 ity, 411; and decay, 412; food 

 or, 413; and moisture, 413; and 

 temperature, 414; and light, 415; 

 relation to canning, 417; rela- 

 tion to disease, 421-446. 



Bacteriology, 397, 425. 



Baguios, 277. 



Balances, beam, 537; spring, 538. 



Barograph, 193. 



Barometer, siphon, 186; Fortin's 

 pattern, 186; correcting the read- 

 ing of, 187; correcting for tem- 

 Eerature, Table, 188; correcting 

 )r altitude, Table, 191; effect of 

 passing storm upon, 257; and 

 wind indications, 261. 



Baume"s hydrometer, 27; test for 

 oil, 28. 



Blood pressure, 182. 



Blower, of gasoline gas machine, 

 37; of the plenum system, 333. 



Boiler, the, 574 ; of hot water heat- 

 ing system, 127; of steam heating 

 system, 131; of kitchen range, 

 479, 490; of Central Square 

 water works, 486; 18th Century 

 hot water supply, 500; circula- 

 tion through range, 501. 



Boiling, 15 ; temperature of water, 

 15; temperature of alcohol, 19; 

 of mixture of alcohol and water, 

 20; point, meaning of, 17; point 

 of water, 134; at varying pres- 

 sures, 135. 



Bone char, 374. 



599 



