TABLE OF CONTENTS. XV 



PAliE 



Action on inBects - 163 



Use - - 163 



56. Silicate of Alumina (china clay). 



Occurrence ------------ 164 



Properties 164 



Use - 164 



Use against insects 164 



Use against rabbits 164 



57. Zinc Sulphide, ZnS. 



Preparation ------------ 164 



Properties -----.-..--■- 164 



Use 164 



58. Zinc Chloride, ZnClg. 



Preparation ------------ 165 



Properties ------------ 165 



Action on fungi ----------- 165 



Trial as pickle for seed-corn 165 



59. Zinc Sulphate, ZnS047H20 (wiiite copperas, white vitriol). 



Preparation 165 



Properties 165 



Action on plants 165 



Stimulating action of minimum doses 165-6 



Action on cryptogamic parasites 166 



Use 166 



60. BoBATE OF Zinc, ZiiBfi^. 



Preparation 166 



Use as bouillie for oats and wheat 166-7 



Use against fungi - 167 



61. Silicate of Zinc 167 



62. Zinc Ferrocyanide 167 



63. Sulphocarbolate of Zinc (zinc sulpho-phenate) ----- 167 



64. CAD.MIUM Sulphate, CdS044H20. 



Preparation - - - " - - - - 167 



Properties 167 



Use 167 



CHAPTER X. 



Iron Peroxide — Iron Bouillies — Iron Sulphide — Iron Chloride — Green Vitriol 

 — Ferric Sulphate — Potassium Ferroctanide — Prussian Blue — Borate of 

 Iron. 



65. Ferric Hydrate, Fe2(H0)g. 168 



Preparation ------------ 168 



Bouillies 168 



Properties --------.... igg 



Action on plants ----------- 168 



Pellegrini's bouillie ---------- 169 



Aderhold's bouillie 169 



Sorauer's bouillie ----------- 169 



Failure of ferric bouillies 169 



Mixed cupric and ferric bouillies 169 



66. Sulphide of Iron (ferrous sulphide), FeS2. 



Preparation -" 169-70 



Properties ------------ 170 



Use - 170 



67. Iron Chloride, Fe2Cle5H30. 



Preparation ------------ 170 



Properties 170 



Use 170 



Use as pickle for seed-corn --------- 170 



Use against chlorosis - - . - ------ 170 



