INDBX 667 



Gunning method, official, to include nitrates 382 



reactions 37 x 



Gypsum 4 g 8) S94 



action on black alkali 602 



analysis , 600 



composition 602 



consumption for agricultural purposes 600 



solubility in sodium carbonate 60 1 



value 599 



water of crystallization 602 



H 



Hair 290, 609 



Halle station methods for phosphoric acid and basic slags 199 



Hanamann, direct weighing of phospho-molybdate precipitate 122 



Hartsalz 503, 553 



Hayes, origin of white phosphates 36, 37, 38 



Hen manure 594 



analysis 606 



properties 605 



Hoof 290 



Horn 290, 609 



Huston, digestion apparatus 115, 116, 117 



mechanical stirrer 118 



solubility of phosphates no 



value of finely ground bone 47 



I 



Ignition with sulf uric acid 538 



Incineration, loss of phosphoric acid 52, 53 



of organic phosphorus, Leavitt and LeClerc's method S3 



Indigo method of Boussingault 427, 429 



Marx 426 



Warington 429 



solution preparation 428 



standardization 429 



Indigotin preparation 43 



standardization 43' 



Inorganic plant constituents, official methods of determination 617 



lodin in phosphates 273 



titration 351 



lodometric estimation of nitrogen 450, 451, 452, 453 



Insect pests, classifications 626 



kinds 625 



Insecticide analysis, scheme for reporting 653 



statement 652 



Insecticides 625 



classification 626 



for animal parasites 649 



external sucking insects 640 



insects affecting stored grains 649 



subterranean insects 648 



International Steel Standards Committee, methods 173 



