TABLE OF CONTENTS. XVll 



PAGE 



Trial as pickle for seed-corn -------- 189-90 



Action on uredospores - - - - 189-90 



Use against fungi ----------- 190 



Use against insects 190 



75. Permanganate of Potash, KMnO^. 



Preparation ------------ 190 



Properties ----------- - 190 



Action on fungi - - . 190, 191, 192 



Use as pickle for seed-corn --------- 190 



Use as a disinfectant - . . 190 



Disinfection of trees 192 



Use against conifer disease 192 



76. Manganese Sulphate, MnS0^5H20. 



Preparation ------------ 192 



Properties .--...------ 192 



Stimulating action of minute doses of manganese salts on plants - - 192-3 

 Use against fungi ----------- 193 



77. Nickel Sulphate, NiSO,7H20. 



Preparation ------------ 193 



Properties ------------ 193 



Stimulating action of minimum doses on plants ----- 193 



Action on parasitic fungi --------- 193 



Use against fungi ----------- 193 



Use against grey rot of the vine 194 



78. Cobalt Sulphate, C0SO47H2O. 



Stimulating action of minimum doses on plants ----- 194 

 Action on parasitic fungi ...---.-- 194 



CHAPTER XII. 



Red Lead— Lead Arseniate — Lead Arsenite — Lead Carbonate (White Lead) — 

 Lead Acetate (Sugar of Lead)— Silver Nitrate (Lunak Caustic) — Silver 

 Chloride. 



79. Red Lead, PbgO^ 195 



Preparation - - 195 



Properties 195 



Use 195 



Use to protect seed-corn against birds 19'5 



Use to preserve pine and spruce fir seeds from birds . . . . 195 



80. Arseniate of Lead, PbgASjOg. 



Preparation ------------ 195 



Properties - - - ......... 195 



Action on plants ----------- 195 



Action on insects ----------- 195 



" Disparin," composition of -------- - 196 



Use against insects -........- 196 



Bouillies 196 



81. Lead Arsenite, PbAs.^Of,. 



Preparation ------------ 197 



Properties 197 



82. Lead Carbonate. 



Use 197 



83. Lead Acetate, PblC.^HgOa)^ 3H2O. 



Preparation 197 



Properties 197 



Action of lead salts on plants 197 



Action on parasitic fungi 197 



Trial as pickle for seed-corn 197 



Bouillie with milk of lime 197 



