Chemistry of the Manufacture of Superphosphates, [pp. 150-156].—Reactions with phosphates; with fluorids; with carbonates; with iron and alumina; with magnesium compounds; Determination of quantity of sulfuric acid; Phosphoric acid superphosphates; Authorities cited in Part First.
PART SECOND.
NITROGEN IN FERTILIZERS AND
FERTILIZING MATERIALS.
Kinds of Nitrogen in Fertilizers, [pp. 161-169].—Determination of state of combination; Microscopic examination; Seeds and seed residues; Fish scrap; Dried blood and tankage; Horn, hoof, and hair; Ammoniacal nitrogen; Nitrogen in guanos; Nitric nitrogen.
Methods of Analysis, [pp. 169-192].—Classification of methods; Official methods; Combustion in copper oxid; Official volumetric method; Mercury pump; Combustion furnace; Process of combustion; Method of Johnson and Jenkins; Calculating results; Reading barometer; Tension of aqueous vapor; Aqueous tension in solutions of potassium hydroxid; Tables for calculating results; Soda-lime process; Official French method; The ruffle soda-lime method; Official ruffle method; Boyer’s ruffle method.
Moist Combustion Process, [pp. 192-220].—Historical; Method of Kjeldahl; Theory of the reactions; Preparation of reagents; Dutch kjeldahl method; Halle kjeldahl method; Official kjeldahl method; Distillation apparatus; Patrick’s distilling flask; Modification of the kjeldahl process; Method of Wilfarth; Method of Asboth; Method of Jodlbaur; Dutch jodlbaur method; Halle jodlbaur method; Official method for nitric nitrogen; Method of Scovell; Gunning method; Reactions of the gunning method; Official gunning method; Gunning method adapted to nitrates.
Determination of Nitrogen in Definite Forms of Combination, [pp. 221-231].—Introductory considerations; Nitrogen as ammonia; Method of Boussingault; Determination of thiocyanates; Separation of albuminoid nitrogen; Separation of nitric nitrogen; Separation of ammoniacal nitrogen; Ulsch method for mixed fertilizers; Method of Schlöesing-Wagner; Schmitt’s modified method; Krüger’s method.
Sodium Nitrate, [pp. 231-247].—Functions of sodium nitrate; Commercial forms of Chile saltpeter; Percentage of nitrogen in Chile saltpeter; Adulteration of Chile saltpeter; The Halle zinc-iron method for estimating nitrogen in Chile saltpeter; French method; Gantter’s volumetric method; Method of difference; Application of Chile saltpeter to the soil; Taking samples of soil to determine nitric nitrogen; The nitrifiable solution; Quantity of Chile saltpeter per acre; Consumption of Chile saltpeter; Authorities cited in Part Second.
PART THIRD.
Potash in Fertilizing Materials and Fertilizers, [pp. 248-266].—Introduction; Forms of potash; Organic sources of potash; Tobacco stems and waste; Cottonseed hulls and meal; Wood ashes; Fertilizing value of ashes; Sugar beet molasses; Residue of wineries; Destruction of organic matter; Ignition with sulfuric acid; Potash in mineral deposits; Occurrence and history; Changes in potash salts in situ; Kainit; Carnallit; Polyhalit; Krugit; Sylvin; Sylvinit; Kieserit; Schönit; Potassium sulfate; Potassium magnesium carbonate; Potash in factory residues; Quantity of potash salts used.