X CONTENTS 



Methods for concentrated salts ; Methods for calcined salts ; Prepara- 

 tion of solutions ; Lunge's modification of technical methods ; The bar- 

 ium-oxalate method ; Method of de Roode ; Calcium-chlorid method ; 

 Moore's method modified by Veitch; Application of the platinum 

 method in presence of sulfates ; Rapid control method ; Weighing the 

 precipitate as metallic platinum; Sources of error in the platinum meth- 

 od; Effect of concentration; Differences in crystalline form; Factors for 

 potash; Recovery of platinum waste; Preparation of chlor-platinic acid. 

 Estimation of Potash as Perchlorate, pp. 578-593. General principles; 

 Schloesing's modification ; Kaspar's method for preparing perchloric 

 acid; Kreider's method; Keeping properties of perchloric acid; Tech- 

 nique of the process ; Disturbing factors ; Removal of sulfuric acid ; 

 Application to crude potash salts ; Influence of carbonates ; Applicability 

 of the process; Accuracy of the process. 



PART FOURTH 



Miscellaneous Fertilisers, pp. 594-625. Classification ; Forms of lime ; 

 Application of lime; Action of lime; Best forms of lime; Analysis of 

 lime ; Gypsum ; Analysis of gypsum ; Solubility in sodium carbonate ; 

 Common salt ; Green vitriol ; Hen manure ; Guanos and cave deposits ; 

 Total phosphoric acid in guanos ; Waste leather ; Analysis of wood ashes ; 

 Carbon, sand, and silica ; Phosphates and alkaline earths ; Method of 

 McElroy ; Early official methods for alkalies ; Official methods for the 

 determination of inorganic plant constituents ; Sulfur in plants ; Chlorin 

 in plants ; Stating results of fertilizer analyses ; The elemental system ; 

 The objections to the elemental system; The advantages of the elemental 

 system ; The ionic system ; General conclusions. 



Insecticides and Fungicides, pp. 625-653. Kinds of insect pests ; 

 classification of insecticides ; Paris green ; Methods of analysis ; Discus- 

 sion of methods of analysis ; Green arsenoid ; London purple ; Methods 

 of analysis ; Discussion of methods of analysis ; Lead arsenate ; Methods 

 of analysis ; Insecticides for external sucking insects ; Soaps ; Caustic soda 

 and potash ; Methods of analysis ; Lime-sulfur-salt mixture ; Methods of 

 analysis; Kerosine emulsion; Tobacco and tobacco extract; Determi- 

 nation of nicotin ; Potassium cyanid ; Carbon disulfid ; Insecticides for 

 stored grains ; Insecticides for animal parasites ; Fungicides ; Formalde- 

 hyde ; Bordeaux mixture ; Copper sulfate ; Official methods of analysis ; 

 Discussion of methods of analysis ; Statement of Insecticide analyses ; 

 Scheme for reporting results of analysis. 



