INDEX. 



Air. movements through soil, 125 ; elas- 

 ticity of, 8 ; moisture absorbed from 

 by soils, 177 ; need for in soil, 204 ; 

 volume changes with temperature, 207 ; 

 volume of in soil, 208 ; composition of 

 respired, 350 ; micro-organisms in, 

 3b2 ; amount respired, 35.i, 354, 355 ; 

 degree of impurity permissible, 354 ; 

 supoly for stables, 355 ; introduction 

 Into stables, 355, 356, 357, 362, 3U3, 

 364 ; exclusion of from silos, 394 ; 

 warming of, 560, 581 ; pressure per 

 sq. ft., 532 ; see atmosphere. 



Alfalfa, developing mulch for. 193. 



Alkali, amount limiting plant growth, 

 93 ; in Yellowstone Park, 93 ; in Al- 

 geria, 93 ; white, 93 ; black, 93 ; 

 amount influenced by tillage, 98. 



Alkali lands, correction for, 95 ; draii. 

 age remedy for, 98. 



Ammonia, occurrence In soil, 83 ; conver- 

 sion into nitric acid. 86 : in rain water, 

 86 ; removed from lungs, 351 ; in at- 

 mosphere and rain, 86, 557. 



Aniline, divisibility of, 9. 



Animals, as motors, 487 ; as soil pro- 

 ducers, 64. 



Animal temperature, regulation of, 83 ; 

 normal, 343. 



Anticyclone, 561, 571, 572. 



Ants, in formation of soil, 67 ; drainage 

 allows deeper penetration, '290. 



Architecture, rural, 329. 



Argon, amount of in atmosphere, 557. 



Arid soils, 50, 73 to 75. 



Artesian wells, general flow of water 

 supplying, 270 ; conditions for forma- 

 tion, 277. 



Atmosphere, 554 ; influence on tempera- 

 ture, 23, 557 ; source of plant food. 

 554, 558 : relation to earth, 554 ; rela- 

 tion to life, 555 ; depth of, 556 : com- 

 position of, 556 ; materials suspended 

 in, 557 ; functions of ingredients, 557 ; 

 pressure, 559 : temperature of, 560 ; 

 movements of, 561 ; general circula- 

 tion, 562, 564. 



Atoms, 7. 



Babbitt metal, 515. 



Baker, J. O., drainage system of Ron- 

 toul, 111., 309. 



Balloon frame, 340. 



Barley, nitrogen used by, 62 ; alkali salts 

 limiting growth of, 94 : water used by, 

 143 ; root development of, 150, 153 ; 

 germination temperature, 212. 



Barn frames, forms of, 339 ; plank, 340 ; 

 balloon, 340 ; round, 341. 



Barns, frames of, 339, 340, 341; best 

 temperature for, 344 ; relation of 

 bight to capacity, 367 ; separate or 

 consolidated, 370 ; avoiding posts in, 

 374 ; stable floors, 374 ; watering in, 

 888 ; unloading hay in, 391 ; ventila- 

 tion of. 350. 



Barometric pressure, 559, 568, 569 ; 

 changes influence' soil' ventilation, 

 208 ; causes change of level of water 

 in wells, 173 ; of rate of discharge 

 from springs, 273 ; of rate of dis- 

 charge from tiled drains, 271 ; changes 

 of In storms, 575, 582. 



Basement stables, ventilation of, 355, 

 3.")G, 364 ; may be sanitary, 364. 



strength of, 331, 332, 334 : com- 

 puting loads for, 336 ; table of safe 

 loads, 338. 



Beans, nitrogen used by, 82 ; germina- 

 tion temperature, 212. 



Bedding, use of, 376. 



Beef fat, fuel value of, 33. 



Belting, 543 ; action of, 543 ; efficiency, 

 543 ; computing size, 544 ; care of, 

 544 ; management of, 545 ; lacing of, 

 545 : computing length of, 546. 



Berthelot, on soil nitrogen, 89. 



Uidwell, stall, 385. 



Boiler, 508 ; construction of, 509 ; care 

 of, 512 ; cleaning, 512 ; flrine. 513 ; 

 foaming, 513 ; low water In, 514 ; ex- 

 plosion of, 514 : soft plug, 614 ; 

 water for, 515, 517. 



Boiler scale, 512, 517. 



Box stall, ventilation of, 387. 



Braces, uses of, 338. 



Brick, walls of, 347, 402 ; vitrified, 403. 



