TABLE OF CONTENTS. IX 



PAGE 



ActioQ of carbon dieulphide on insects 56 



Action on fungi - - - 57 



Influence on fertility of soil 57.9 



Use - - - - - 59-77 



History 59 



Vaselinated sulphide ---------- 61-2 



Instruments for applying carbon disulphide ------ 62 



Pal-gastine 62 



Avant-pal - - 62 



Pal-excelsior ..--.-.---- 62-3 



Sulphurators 63 



Disinfection in closed spaces 63 



Destruction of aerial parasites 64 



Use against cryptogamic diseases 64 



Use against eel-worms ---------- 65 



Use against insects ....------ 65-71 



Underground disinfection --------- 71 



Extermination treatment -..------ 71 



Cropping treatment 72 



Use of pure carbon disulphide - - - - - ' - - - 72 



Use of carbon disulphide dissolved in water 74 



Insecticide irrigations 75 



CHAPTER IV. 



SxTLPHUKOUs Acid — Sulphuric Acid (Oil of Vitriol) — Chlorine — Hydrochloric 

 Acid — Nitric Acid. 



6.. Sulphurous Acid, SOj 78 



Properties ------------ 78 



Action on plants ----------- 78-80 



Action on fungi ------ -----80 



Action on insects ----------- 80 



Use in diseases treated by SO2 in the open air 80 



Use in closed spaces - - 80 



7. Sulphuric Acid, H2SO4. 



Natural occurrence 88 



Properties 83 



Action on plants 83 



Action on fungi 83-8 



Use as pickle for seed-corn - 83-6 



Use as weedkiller ----------- 85 



Use against insects and eel-worms - 88 



Use against wasps - ■ - - - - - - - - - - 88 



8. Chlorine, CU. 



Preparation ------------ 88 



Use against dry rot .-.-.----- 88 



9. Hydrochloric Acid, HCl. 



Preparation ------------ 88 



Use - - - - 88 



Action of chlorine and hydrochloric acid on plants 89 



10. Nitric Acid, HNO3. 



Preparation ------------90 



Properties 90 



Action on plants - 90 



Use 90 



Use against fungi 90 



Use against insects - - 90-1 



