68O INDEX 



Volumetric determination of phosphoric acid, classification of methods 130- 



method, calculating results 337 



disuse 337 



use for nitrogen determination 337 



processes, direct titration 131 



for phosphoric acid titration after previous separation 131 



silver method 17% 



solution 134 



W 



Wagner's digestion apparatus for basic slags 202 



method for basic slags, solutions employed 203 



phosphoric acid and basic slags 20: 



Water- and citrate-soluble phosphoric acid precipitation 119 



Water, preparation of ammonia free 481, 482 



Water- soluble arsenic oxid 636 



arsenic oxid determination 639 



arsenious oxid 636 



determination 629, 630 



phosphoric acid, official method 60 



volumetric method 160 



Waste leather 608 



matters as fertilizers 2 



White phosphates, Hayes" theory of origin 36, 37, 38 



occurrence 34 



origin 36 



properties 39 



specific gravity 39 



utilization 39 



Williams-Warington method for nitric acid determination 447 



Wood ashes 594 



analysis 609 



composition 529 



Y 



Yellow precipitate, percentage of phosphoric acid 164 



titrating 164 



weighing , 164 



Z 



Zinc sulfid and sodium thiosulfate method 377 



