_Titration of the Yellow Precipitate_, pp. 106-118.—Pemberton’s method; Conduct of the analysis; Reactions; Calculation of results; Comparison with Official method; Titration as a lead compound; Water soluble acid; Estimation of phosphoric acid in presence of a large excess of iron; Emmerton method; Method of Dudley and Noyes; The Jones reductor; The volumetric silver method. _Technical Determination of Phosphoric Acid_, pp. 118-125.—Desirability of methods; Reagents employed; Conduct of the molybdenum method; Conduct of the citrate method; Treatment of mineral phosphates and basic slags; Analysis of superphosphates. _Miscellaneous Notes on Phosphates and Phosphatic Fertilizers_, pp. 126-150.—Time required for precipitation; Examination of the pyrophosphate; Iodin in phosphates; Chromium in phosphates; Estimation of Vanadium; Fluorin in bones; Note on separation of iron and alumina from phosphoric acid; Ammonium citrate soluble acid; Influence of time and strength of solvent on solution; Arbitrary Determination of reverted phosphoric acid; Digestion apparatus of Huston; Huston’s mechanical stirrer; Citrate method with small percentage of phosphoric acid; Direct precipitation of the citrate soluble phosphoric acid; Availability of phosphatic fertilizers; Direct weighing of the molybdenum precipitate. _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.