INDEX 675 



1'hosphoric acid determination of amounts soluble in citric acid solution 215 



citrate-soluble in basic slag 200 



citric-acid-soluble in basic slag 218 



official Swedish method 74. 75. 7^ 



Oliveri method 184 



preferred method 5<> 



preparation of reagents 56, 57, 58 



royal experiment station of Holland method 76, 77, 78 



silver method 177 



technical 1 79 



total 187 



Veitch method for available 120 



modification of Ross method 64-65 



volumetric method 13 



in superphosphates 147 



investigation by official chem- 

 ists 1 58 



optional 159 



direct determination of available 63 



precipitation of citrate-soluble 106, 107 



estimation as lead compound 160 



fixation in soils 283 



loss by incineration S 2 53 



precipitate, time of subsidence 137 



precipitation by magnesium citrate 135 



filtration and washing 137 



with metallic tin 108, 109 



removal by iron chloric! 613 



solubility in ammonium citrate no 



soluble, molybdic method of the German experiment stations 72 



solution, verification of standard 140 



solvent for mineral phosphates 282 



time required for precipitation 62 



titration in steel 174 



of the yellow precipitate 153, 154 



calculation of results.... 156 

 comparison of results... 157 



reagents 155 



typical solution 139 



water-soluble 166-186 



German method of determination 68 



Phosphorus, calculation in iron and steel 172 



in steel 176, 177 



content in pig iron 194 



Platinic chlorid, preparation 559 



Platinum method^ sources of error 570 



waste, recovery 573, 574 



weighing, metallic 569 



Polyhalit 486 



description 498 



Potash, actual 491 



analysis, effect of concentration on accuracy 571 



preparation of sample 538 



