TABLE OF CONTENTS. XXlll 



CHAPTER XVII. 



Mercuric Chloride (Corrosive Sublimate) — Tin Crystals. 



PAGE 



108. Mercuric Chloride (corrosive sublimate), HgCl, - . - . 289 

 Preparation ------------ 289 



Properties - - 289 



Action on plants 289 



Action as weedkiller - - . 289 



Stimulating action of infinitesimal dose 289 



Pickling of seed - - . . 289-90 



Comparative dose of sublimate, green vitriol, and blue vitriol to kill 



spores - . - . 290 



Action on insects - . . 291 



Uses 291 



Use against lichens - - 291 



Use against potato scab - - . . 29L 



Use against beet jaundice - - - . 291 



Use against vine mildew - . . 291 



Use against black rot of grapes 291 



Use as pickle for seed-corn ----■--..- 291 



Disinfection of flower seeds --------- 291 



Use against insects ---------- 291 



Use against ants ----------- 291 



Use against rodents .-.----.-. 291 



109. Tin Crystals, SnClg. 



Preparation - - - 293 



Properties ----- --..... 293 



Use - - - - 293. 



CHAPTER XVIII. 



Derivatives of Carbon (Carbon Compounds). Products Derived from the' 

 Fatty Series : Petroleum (Burning Oil) — Petroleum Sprays — Petroleum 

 Oil Emulsions — Petroleum Soap Emulsions — Petroleum Spirit — Vaseline 

 — Acetylene. 



110. Petroleum - - - - 295 



Occurrence ------ 295 



Commercial products . - - - - 295 



1. Petroleum ether ---.---.. 295 



2. Light oils - - ■ - - 295 



3. Petroleum oil ----- - . . - - 295 



4. Heavy petroleum oils ----.-.. 295 



5. Crude paraffin wax scale -------- 295 



Petroleum oil, burning oil 295 



Action on plants ------ 295 



Action on insects - - - - 295 



Use in pure state ------ 295 



Sprays ------------- 295 



Directions (specifications) for spraying 295 



Time tor spraying - - . . 296 



Action on pear and apple-trees ------.. 296 



Use against insects - - - . . 296 



To be used against San Jose louse ------ 296-8 



Petroleum emulsions 298-301 



Preparation and formulae 298-301 



Sand emulsion .-.-...-... 29& 



