_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. _Methods of Analysis_, pp. 266-289.—Classification of methods; Platinic chlorid method; Official method; Alternate official method; Solution of organic compounds; Factors for calculation; Halle potash method; Dutch method; Swedish method; Method of the German Kali syndicate; Method for high grade potash salts; Barium oxalate method; de Roode method for kainit; Calcium chlorid method; Rapid control method; Determination from metallic platinum; Errors in platinum method;Effect of concentration on accuracy; Differences in form of crystals of potassium platinochlorid; Recovery of the platinum waste.