594 



Index. 



Brick-lined silos, construction of, 403; 



lining for, 406. 

 Brick silos, construction of, 400 ; 



strengthening walls of, 401, 402. 

 Brown-Sequard, on respiration, 352. 

 Building paper, for walls, 348 ; for silos, 



415. 



Calcium, essential plant food, 69; func- 

 tion of, 71. 



Calm belts, 565 to 569. 



Capillarity, modified by dissolved salts, 

 106 ; principle of, 37. 



Capillary capacity, maximum of soils for 

 water, 132 ; of sands for water, 134 ; 

 influenced by distance above standing 

 water, 134. 



Capillary rise, in glass tubes, 37, 161 ; of 

 water in soils, 163 ; in sandy loam, 

 165 in clay loam, 165 ; in sand, 167 ; 

 in wet soil, 168 ; in dry soil. 168 ; in- 

 fluenced by rain, 170, 190; by farm 

 yard manure, 172, by soil mulches, 

 173, by firming the soil, 174, by sub- 

 soiling, 199. 



Carbon dioxide, mode of escape from 

 lungs, 6 ; number of molecules In one 

 gram, 10; removed by soil ventilation, 

 206 causes flogculation of clay, 210 ; 

 Inexpired air, 350; heavier than air, 

 361 ; danger from in filling silos, 427 ; 

 source of carbon in plants. 554 ; per 

 cent, of In atmosphere, 557 ; influ- 

 ence of on temperature, 558. 



Cattle, normal temperature of. 344 ; ties 

 for, 384 ; tying for feeding, 387. 



Cement, kinds of, 379 ; for silo walls 

 398, 402, 406, 407. 



Cement floors, 370 ; condensation of 

 moisture on, 351; temperature of, 

 375; construction of, 379; materials 

 for 380 ; ratio of Ingredients for, 

 381 ; laying, 382 ; cost, 383 ; for cel- 

 lar or creamery, 383 ; for silos, 410. 



Chamberlin, cause of glacial periods, 

 559. 



Cheese curing rooms, masonry walls for 

 347 ; construction of, 347. 348. 



Chemical changes produced by ether 

 waves, 24 : influence of on soil tern 

 perature. 219 ; source of power In en 

 gines, 486. 



Chemical nature of soils, 69, 74, 75. 



Chlorine, essential to fertile soil, 69. 



Chlorophvll, requires iron in soil, 70; 

 cells, 143. 



Clay, difference between puddled, and 

 soil, 233; shrinkage checks when 

 drained, 290. 



Clay soil, aluminum silicate In, 49 ; com- 

 pared with sandy, 71, 74, 75, with 

 others, 73: amount of plant food per 

 acre foot, 80 ; flocculatlon by carbonic 

 acid, 210, 290. 



Clover, plant food contained in 79; 

 sowing seed before frost is out, 193 ; 

 germination temperature, 213 ; water 

 used by, 141 ; extent of root develop- 

 ment, 150, 156. 



Coal, fuel value of, 502. 



Coal tar, use on floors, 377 ; use on silo 

 linings, 407. 



Coathupe, amount of air respired, 353. 



Cohesion, (i. 



Cold, nature of, 25. 



Cold waves, 582. 



Colin, amount of air breathed, 354. 



Collars, for tile drains, 292. 



Color, Influence on soil temperature, 

 217 ; waves of, 23. 



Conservation of energy, 19. 



Contour maps, of surface, 256 ; of 

 ground water, 257, 259. 



Corn, variation of soluble salts in soil 

 under with season, 96 ; water used by, 

 root development of, 150, 152, 

 157; early fitting of ground for, 

 danger in late cultivation, 189, 

 best time to cultivate, 192 ; hill- 

 194 ; plowing for in fall, 252 ; 



141 



154, 

 185 

 190 

 ing 



grinding by windmill, 536. 



Coulter, effect of on draft of plow, 243 



Cover crops, object of, 183 ; danger of, 

 201. 



Cows, normal temperature of, 344 ; 

 stable temperature for, 344 ; amount 

 of air respired, 354 ; supply of air for, 

 355 ; cubic feet of space for, 357 ; 

 ties for, 384. 



Crops, amount of water required by, 

 139 : proportion of soil water avai- 

 lable to, 135 ; soils which yield moist- 

 ure most completely, 136. 



Cultivation after heavy rains, 190 ; 

 depth of to save moisture, 191 ; fre- 

 quency of, 187 ; frequency vary with 

 season, 191 ; influence of frequency on 

 mulches, 189 ; Influence of depth on 

 effectiveness of soil mulches, 189 ; 

 ridged and flat, 194 ; too great fre- 

 quency undesirable, 189. 



Cultivators, for intertillage, 226; 



spring tooth, 227 ; with wide shovels, 

 227 ; with rigid teeth, 228 ; teeth of, 

 adjustable, 228 ; disk form, 229 ; for 



surface cultivation, 229 ; garden types, 

 230. 



'ulverts, 479. 



ryclone, 562, 570, 571, 572, 576 ; trop- 

 ical, 585. 



Cylinder of pump, In well, 546, 551 ; 

 of steam engine, 518, 520 ; water 

 jacket for In gasoline engine, 624 ; ot 

 double acting pump, 550. 



D. 



Darcy's law, 262, 269. 

 Darwin formation of soil, 65 ; soil con- 

 vection, 67. 



