XVm TABLE OF CONTENTS. 



PAGE 

 84. NiTUATE OF SlLVEU, AgNOj. 



Treparation 197 



Properties 198 



Action on plants . . - - 198 



Action on fungi 198 



Action on spores 198 



Use 198 



65. Silver Chloride, AgCl. 



Preparation 198 



Properties 198 



Use 198 



"Puknos," composition of -.--..--- 198 



Use against cryptogamic diseases in general 198 



CHAPTER XIII. 



Copper Sulphide — Copper Nitrate — Copper Chloride — Copper Sulphite — 

 Copper Sulphate (Blue Vitriol). 



86. Copper Sulphide, CuS. 



Preparation - - - - 199 



Properties 199 



Use 199-200 



Use as bouillies - - - - 199-200 



Guillon's formula 200 



87. Copper Nitrate, Cu(N03)„3H20. 



Preparation ------------ 200 



Properties 200 



Use - - 200 



Use as a pickle for seed-corn 200 



Use as weedkiller .......... 200 



88. Copper Chloride, CuCl22HoO. 



Preparation ------------ 200 



Properties 200 



Use - - -200-1 



Use as a pickle for seed-corn 200-1 



Recipes for bouillies 201 



89. Copper Sulphite, CuSO^. 



Preparation of bouillie 201 



Properties -.--.-.----- 201 



Action on plants ..--.------ 201 



Action on fungi 201 



90. Sulphate of Copper (blue vitriol, blue copperas), CuSO^SHoO. 



Preparation ------------ 201 



Properties ----------- 201-2 



Toxic effect of copper salts on human subjects 202 



Verdigris woikers immune to anjemia 202 



Distribution of insecticidal and anti-cryptogamic copper between wine, 



lees, etc. (table) 203 



Action on plants 203-7 



Action on algffi and saprophytic fungi 207-8 



Action on parasitic fungi . - - 208-11 



Use as pickle for seed-corn 208-11, 217-24 



Action on insects ---------- 210-11 



Use as a weedkiller -....----- 211 



Use to destroy dodder ---------- 211 



Use against mosses and lichens -------- 211 



Use against cryptogamic diseases of plants .... - 211-13 



Use of mixtures containing blue vitriol 214-15 



