TABLE OF CONTENTS. XI 



PAGE 



'23. Sodium Hyposulphite, NaaSgO.SHoO. 



Preparation - - - - 102 



Troperties - - - 102 



Action on plants 102 



Action on fungi 102 



Crouzel's anti-cryptogamic - 103 



24. Sodium Sulphate, Na2S04. 



Occurrence ..-...------ 103 



Prepaiation ------------ 103 



Properties 103 



Use - - - - - 103 



Use as pickle for seed-corn -.------- 103 



25. Sodium Chloride (common salt), NaCl. 



Occurrence ...--------- 104 



Properties 104 



Role as manure 105 



Use as weedkiller - 106 



Use to destroy moss 106 



Use against potato diseases 106 



Use against insects ....------ 106 



Use to preserve green fodder during winter ------ 107 



26. NiTEATE OF Soda, NaNOj. 



Occurrence . . - - - 107 



Properties - - - - . 108 



Action on plants ...-------- 108 



Action on fungi - 108 



Action on insects ------ ....- 108 



Use as weedkiller .---------- 108 



27. Arsenite of Soda, NaAs»0,. 



Use - - - -' " 10& 



Use as pickle for seed-corn - 10& 



Use in preparations to kill locusts . . - - - . - 10& 



28. Borax, Na.BjOv. 



Occurrence -.---------- 109 



Preparation ------------ 109 



Properties ..---------- 109 



Use - - - 110 



29. Carbonate of Soda, NaoCOj. 



Preparation -.---------- 110 



Properties ..--.------- 110 



Action on plants - - - - ------- 110 



Action on fungi 110 



Action on insects - HO 



Use 110-11 



CHAPTER Vn. 



Potassium Hydroxide (Caustic Potash) — Potassium Sulphides (Liver of Sulphur) 

 — Potassium Chloride (Muriate of Potash) — Potassium Nitrate — Potassium 

 Sulphocarbonate — Potassium Xanthogenate — Potassium Cyanide (Prussic 

 Acid) — Potassium Sulphocyanide. 



30. Caustic Potash, KHO - 112 



Properties 112 



Use 112 



31. Potassium Sulphides, KoS to KjSj. 



Liver of sulphur 113 



Properties - - ----- - . - - 113 



Use - - - 113 



Use against bacteria 114 



Use against fungi - 114 



