INDEIX 



Absorption towers 3 1 5 



Acetaldehyde 651 



Adulteration of basic slag 221 



Albert, method for phosphoric acid i go 



Albuminoid nitrogen 387 



detection 323 



Alkalies, early official method 616 



estimation in ash 615 



Alsace, potash deposits 489 



Alumina and ferric oxid, determination 67 



in natural phosphates, estimation. .. .253, 254, 255, 256 



257, 258, 259 



iron, estimation 247 



estimation in ash 612 



Richters-Fcrster method of detection 220 



separation from iron by phenyl-hydrazine 259 



Aluminum mercury couple 449 



phosphate , adulteration with 220 



composition 256 



Amid nitrogen 388 



Ammonia 287 



albuminoid 483 



determination 383 



method of Boussingault 384 



in rainwater, determination 448 



salts, effects 302 



Ammoniacal nitrogen, determination 389 



Ammonio-manganous phosphate, composition 153 



Ammonium citrate, preparation 56 



magnesium phosphate solution 138 



nitrate solution, preparation 57 



sulfate, composition of commercial 386 



Anhydrite 486 



Apatites, availability 121 



Aqueous vapor, tables of tensions 335, 336, 407 



Arsenic acid, determination 635 



error due to 135 



oxid, determination 639 



Arsenious oxid, determination 627, 628, 629, 634 



Ash analyses, statement of results 530, 531 



preparation 618 



Ashes, fertilizing value 532 



Atmospheric nitrogen, fixation by electricity 310 



utilization 310 



Availability of phosphates, method of determining 285 



Available phosphoric acid, direct determination 63 



