XIV TABLE OP CONTENTS, 



PAGE 



Properties lo4 



Action on insects .... 154 



Use as a manure 154-6 



Use against late frosts 156 



Use against fnngi 156 



Use against insects .......... 156-7 



Use against snails and slugs 157 



Use against rodents 157 



47a. Stlphite of Lime, CaS032H20. 



Preparation 157 



(Pi-sulphite of lime 157) 



Use 157 



Use against vine rot 157 



Use in dairies 157 



Use in breweries 157 



48. Calcium Carbide, CaC^. 



Preparation 157 



Properties 157 



Use 157 



49. Calcium Phosphide, CagP.j. 



Preparation .--.-..-.... 157 



Use 158 



50. Arsenite of Lime, Ca.iASaOg. 



Preparation 158 



Properties ............ 158 



Use 158 



CHAPTEE IX. 



Maonesium Chloride — Magnesium Sulphate (Epsom Salts) — Magnesium Bisul- 

 phite — Magnesium Silicate (Talc Soapstone) — Alum — Aluminium Silicate 

 (China Clay) — Zinc Sulphide — Zinc Chloride — Zinc Sulphate — Zinc Borate 

 — Zinc Silicate — Zinc Ferrocyanide — Zinc Sulphocarbolate — Cadmium 

 Sulphate. 



51. Magnesium Chloride, MgClg 159 



Occurrence - - 159 



Preparation -----....... 159 



Properties 159 



Action on plants 159 



Trials as a weedkiller 160-1 



Trials as a pickle for seed-corn ........ 16I 



Use as weedkiller -..----..-. 161 



Use against charlock in corn crops 161 



Use in pine nurseries against yellow leaf of pine 161 



52. Magnesium Sulphate (Epsom salts), MgS047H20. 



Preparation ------- 161 



Properties - 161 



Use 161 



Use to disinfect beet seed 161-2 



53. Magnesium Bisulphite, MgH2(S03)2. 



Preparation 162 



Use 162 



54. Silicates of Magnesia. 



Occurrence 162 



Use 162 



55. Alum, A1o:-3(S04)KoS04, 24H.,0. 



Preparation 163 



Properties - . . 163 



Action en plants 163 



Action on fimgi 163 



