INDEX 665 



Cottonseed hulls 528 



meal 287, 289, 528 



ash, composition 288 



composition ; 288 



Crude phosphates, quantities produced 193 



protein 387 



Crum-Frankland method, Warington's modification 414 



Cupric hydroxid, preparation 388 



Cyanamid compound, toxic effect 308 



value as fertilizer 307 , 308 



later experiments 308, 309 



manufacture 306 



D 



Dall, origin of phosphates 31 



Davidson, origin of Florida phosphates 26 



Destruction of organic matter, method of Neumann 51, 52 



Devarda, nitric acid method 438 



Digestion apparatus for basic slags 202 



reverted phosphates 115, 116, 117 



Diphenylamin, production of colors 466 



Dried blood 287, 290 



Drying, general observations 23 



official methods 23 



samples 22 



Ducks, on Layson Island 291 



Dudley and Noyes method 1 68 



Dutch method, citrate-soluble phosphoric acid 100, 101 



Eldridge, origin of phosphates 29, 30, 31 



Emmerton method 1 68, 1 69 



r 



Feldspar, conclusions regarding use 525, 526 



Cushman's investigations 520 



grinding mills 522 



manurial experiments 519-526 



possible harmful effects 5 2 4 



production and value 5 2 4 



results of cultural experiments 522 



Feldspathic rocks, potash from 518 



Ferric oxid and alumina, determination 67 



catalytic influence 303 



determination 259 



phosphate, estimation in ash 61 : 



Ferrodur 313 



Ferrous sulfate 594 



agricultural uses 603 



analysis 603 



poisonous properties 603, 604 



Fertilizer analysis, advantages of elemental system of stating results 623 



elemental system of stating results 623 



expressed as ions 625 



stating results 621 



