INDEX. 



581 



Iquique, nitrate of soda from, 333. 

 Iron in ash of plants, 54 ; necessary 



for plant-growth, 55 ; reversion in 



superphosphates caused by, 390, 



399. 

 Iron-works, ammonia from, 353, 355, 



358. 

 Irrigation, 431 - 433 ; intermittent, 



434 ; subsoil, 432. 



Jamieson, Professor, experiments 

 with coprolites, 380. 



Jarvis Island guano, 309, 328 ; phos- 

 phoric acid in, 330. 



Jersey, manuring of potatoes in, 521. 



Johnson^ Professor S. W., on appli- 

 cation of superphosphate, 395 ; on 

 Earl Dundonald, 13 ; on nitrogen 

 in buffalo-horn shavings, 426 ; on 

 nitrogen in soils, 123 ; on solubil- 

 ity of basic slag, 408 ; value of 

 organic nitrogen to plant, 46. 



Jurgensen on nitrogen in excreta, 234. 



Kainit, as a fixer, 247 ; potash in, 

 percentage of, 214, 220, 421 ; rate 

 of application of, 423. 



Kaolin clay, analysis of, 104. 



Karmrodt/ analysis of Chincha Island 

 guano, 305 ; of concretionary nod- 

 ules, 328. 



Karnallite, potash in, 220. 



Kellner, experiments on nitrification 

 by, 52. 



Kelp, potash in, 420. 



Kieserite, 420. 



Kinuaird, Lord, experiments by, with 

 farmyard manure, 289. 



Kitchen-garden soil, nitrogenous mat- 

 ter in, 122. 



Knop on condition of nitrates in 

 soil, 138. 



Koosaw River, phosphates from, 376. 



Kreatin assimilated by plants, 47. 



Kuria Muria guano, 309, 328. 



Labrador, guano deposits at, 328. 

 Labradorite, 214 ; potash in, 220. 

 Lacepede Island guano, 309, 328 ; 



phosphoric acid in, 330. 

 Lahn phosphate, 379. 

 Lava, phosphoric acid in, 202, 211. 

 Lawes, Sir J. B., and Gilbert, early 



researches of, at Rothamsted, 34 ; 



experiments with farmyard man- 

 ure, 271 ; experiments with Per- 

 uvian guano, 301 ; inauguration of 

 Rothamsted experiments by, 33 ; 

 on composition of farmyard man- 

 ure, 291 ; on manuring of wheat, 

 483 ; on motion of plant's sap, 56 ; 

 on percentage of food in excreta, 

 233 ; on rate of nitrification, 186 ; 

 on sources of plant-nitrogen, 43 ; 

 on sulphate of ammonia, 356 ; on 

 unexhausted manures, 550, 557-559. 



Lawes, Sir J. B., experiments with 

 guano by, 301 ; manufacture of 

 superphosphate by, 382 ; on ap- 

 plication of superphosphate, 395 ; 

 on bones, 359 ; on composition of 

 farmyard manure, 291 ; on farm- 

 yard manure, 477 ; on loss of ni- 

 trates, 142 ; on sources of nitrogen, 

 154. 



Leather, as manure, 428 ; nitrogen 

 in, 428. 



Leaves, dried, as litter, 242; nitro- 

 gen in, 242 ; phosphoric acid in, 

 242 ; potash in, 242. 



Legrange, Charles, on extent of ni- 

 trate-fields, 343. 



Leguminous plants, benefited by basic 

 slag, 414 by potash, 523 ; fixation 

 of free nitrogen by, 42 ; gain of 

 nitrogen with, 135 ; manuring of, 

 522-527, 530 ; nitrogenous manures 

 hurtful to, 523. 



Lehmann on ammonia as plant-food, 

 50, 352. 



Leipzig, bones from, 361. 



Leones, guano deposits at, 327. 



Leucite, potash in, 220. 



Lias chalk, phosphoric acid in, 211. 



Liebig, criticism of humus theory by, 

 25 ; dissolved bones discovered by, 

 361 ; first report to British Associ- 

 ation, 24 ; manufacture of super- 

 phosphate from bones by, 359 ; 

 mineral theory of, 26-29 ; on am- 

 monia as a manure, 352 ; on im- 

 portation of bones by Britain, 360 ; 

 researches of, in agricultural chem- 

 istry, 23-32 ; services of, to agri- 

 cultural chemistry, 31 ; theory of 

 manures by, 29 ; theory of, on ro- 

 tation of crops, 29. 



Light, action of, on plant-growth, 38. 



