672 INDEX 



Nitrogen, as ammonia 383 



deposits in soils 292 



determination, classification of methods 321, 322 



French commission method 389 



Kjeldahl method 347-355 



moist combustion process, historical 346 



of definite forms 382 



state of combination 322 



official volumetric 323-33 1 



volumetric method 421-423 



calculation 331 



of Bureau of Chemistry 329, 330 



Johnson and Jenkins 331 



from birds 291 



kinds in fertilizers 288 



percentage in Chili saltpeter 299 



seeds and seed residues 288 



states of 287 



utilization by other than leguminous plants 303, 304 



of atmospheric 301 



waste 292 



Nitrogenous materials, microscopic examination 323 



Nitrous acid determination, Chabrier method 474-477 



colorimetric method 467-477 



ferrous sulfate method 477 



general observations 479 



indigo method 426 



Lunge's variation 47 3 



volumetric method 477, 478, 479 



with starch as indicator 474 



Norwegian nitrate 309 



O 



Official methods, solution of phosphates 54 



Organic materials, sampling 15 



matter, destruction 51 



by ignition ,. 538 



moist combustion 539 



nitric and sulfuric acids 51, 52 



precipitation of phosphoric acid therein 65 



nitrogen determination 389 



Oxidation towers 314 



Oxidized nitrogen determination, method of Schloesing 391 



occurrence 391 



P 



Paris green 627 



analysis 627-632 



discussion of methods of analysis 632, 633 



Patrick's distilling flask 368 



Peat 594 



Pellet, method of rendering silica insoluble 63 



Peraldehyde 651 



Perchlorate, estimation in Chilisaltpeter 390 



method of Blattner-Brasseur 391 



