INDEX. 



583 



Maraeaibo guano, nitrogen in, 330 ; 

 phosphoric acid in, 330. 



Marl, phosphoric acid in, 211. 



Marsh -gas from farmyard manure, 

 258. 



Meadow -hay, fertilising ingredients 

 removed from soil by, 485 ; man- 

 urial constituents in, 282 ; Roth- 

 amsted experiments on manuring 

 of, 570. 



Meadow-land, benefited by basic slag, 

 414, 508 ; manuring of, 508 ; Nor- 

 folk experiments on, 509. 



Meat-meal guano, 320, 324 ; com- 

 position of, 152 ; imports of, 324 ; 

 manufacture of, 324 ; nitrogen in, 

 324 ; phosphoric acid in, 324 ; rate 

 of nitrification in, 192 ; source of 

 nitrogen, 152 ; value of, 324. 



Mechi on liquid manure, 442. 



Mejillones guano, 309, 327 ; phos- 

 phoric acid in, 330. 



Mene, on sources of plant - nitrogen, 

 42. 



Menhaddo. guano manufactured from, 

 322. 



Mexico phosphate, 308, 328. 



Mica, analysis of, 105 ; potash in, 

 214, 220. 



Micro-organisms, convert ammonia 

 into nitrous acid, 167 ; convert 

 nitrous acid into nitric acid, 168 ; 

 effect fermentation, 80 ; effect fix- 

 ation of free nitrogen, 44 ; effect 

 nitrification, 161 ; oxidising power 

 of, 197. 



Mild lime, 453. 



Milk, nitrification in albuminoids of, 

 182 ; nitrogen removed in, 147 ; 

 phosphoric acid removed in, 207 ; 

 potash removed in, 218. 



Mineral phosphates, 373-381 ; value 

 of, as a manure, 380. 



Mineral salts necessary for nitrifica- 

 tion, 52. 



Minor artificial manures, 424-429. 



Mixing manures, 532-538 ; ammonia 

 lost in, 533 ; nitric acid lost in, 

 536 ; phosphates reverted in, 536. 



Moisture, atmospheric, action on 

 guano, 300 ; in farmyard manure, 

 260 ; in manures, 543 ; necessary 

 for nitrification, 52, 176. 



Molds, 94. 



Mona guano, 309. 



Mond, Ludwig, on nitrogen in coal, 

 354. 



Monks guano, 327; phosphoric acid 

 in, 330. 



Monocalcic phosphate, 386 ; formula 

 of, 398 ; molecular composition of, 

 398 ; percentage composition of, 

 398 ; reversion of, with iron and 

 alumina compounds, 399 with 

 tricalcic phosphate, 399. 



Mulder on humus in soil, 47, 126. 



Miiller, A., on nitrogen in soil, 121, 

 124. 



Munro, Dr J. M. H. , on nitrification, 

 52 ; on sewage-sludge as manure, 

 439 ; on urine voided, 292. 



Muntz, on ammonia in air, 118 ; on 

 nitrifying organisms in soil, 180 ; 

 on oxidising power of micro-organ- 

 isms, 197. 



Muriate of potash, application of, 

 423 ; forms calcium chloride, 422 ; 

 harmful effects of, 421 ; more con- 

 centrated than sulphate, 422. 



Mustard, 139. 



Navassa phosphate, 308, 328, 379. 



Nesbiton composition of guano, 301, 



New Granada, guano deposits at, 327. 



New Zealand, meat-meal guano from, 

 324. 



Nile, nitrates in waters of, 159. 



"Nitraries,"163. 



Nitrate - fields, appearance of, 340 ; 

 origin of, 334. 



Nitrate of soda, 332 - 351 ; amount 

 exported from Chili, 151, 332, 351 ; 

 amount imported into Britain, 151, 

 351 ; appearance of fields of, 340 ; 

 application of, 347 ; Chili and Peru 

 chief source of, 161 ; composition 

 of, 343 ; crops suited by, 346 ; dis- 

 covery of deposits of, 333 ; extent 

 of deposits of, 342 ; encourages deep 

 roots, 344 ; formation of fields of, 

 334-340 ; method of applying, 347 ; 

 method of mining, 341 ; nitric acid 

 in, source of, 337 ; nitrogen in, 

 percentage of, 343 ; not an exhaust- 

 ing manure, 345 ; origin of fields of, 

 334 ; properties of, 343 ; quantity 

 to apply, 348 ; shipments of, 351 ; 

 soils benefited by, 348 ; source of 



