340 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 



2343. EILEY, C. V. Continued. 

 CHAPTER X Continued. 



132 Method of using poisoned liquids, 132 No results from using 

 poisoned baits late in summer, 133 Poisoning the glands of the 

 plant, 133 Cotton-leaf essence and its attraction to the moth, 

 134 Hand-pick'ing, 135 Mechanical means of killing the worms, 

 136 Shaking off the worms, 136 Poisoning the worms, 136 

 Progress in the use of insecticides, 137 Classification of insecti- 

 cides, 137 Importance of preparing materials in advance, 138 

 Arseuical compounds, 138 Safety in their use, 138 Difficulty in 

 determining minimum quantities, 139 Overdoses of poisons, 139 

 General rules in dry applications, 140 Mixing devices, 141 

 Ingredients, 141 Wet application, 142 Principles to be followed 

 and ingredients to be used, 142 Comparison of dry and wet ap- 

 plications, 142 Paris green, 143 Historical data, 143 Liquid 

 application, 143 Dry application, 144 Minimum quantities, 144 

 Patents on Paris-green combinations, 146 Arsenic, 147 Com- 

 mercial arsenic, 147 Arseniate of soda, 147 Fowler's solution, 

 148 Johnson's dead -shot, 148 Texas cotton-worm destroyer, 149 

 London purple, 149 Manufacture and analysis, 149 History 

 of its use, 150 Experience in Alabama in 1880, 150 Advantages 

 and disadvantages, 151 Dry application, 151 Wet application, 

 152 Other mineral substances, 153 Salt and saltpeter, 15:} Sul- 

 phur, 154 Red lead, 154 Road dust, 154 Oils and allied sub- 

 stances, 155 Kerosene, 155 Former methods of application, 155 

 Invention and perfection of emulsions, 156 Method of prepar- 

 ing'emulsions, 157 Formula for perfected emulsion, 158 Experi- 

 ments with imperfect emulsion in 1880, 158 Experiments with 

 perfected emulsions, 160 Oil of creosote, 162 Oil of tar, 162 

 Gas-tar water, 162 Carbolic acid, 163 Cotton-seed oil, 163 

 Vegetable insecticides, 164 Pyrethrum, 164 History, 164 Mode 

 of cultivation, 165 Success in cultivating the plant in America, 

 166 Preparation of the powder, 167 Its use as an insecticide, 

 168 Advantages and disadvantages, 168 Active principle in 

 Pyrethrum, 169 Its effects on cotton-worms, 169 Imported vs. 

 Californian powder, 170 Dry application, 170 Minimum quan- 

 tities of dry powder, 171 Dry powder mixed with flour and other 

 ingredients, 172 Application in fumes, 174 Alcoholic extract, 

 174 Experiments with extract obtained by distillation, 174 

 Experience with extract obtained by repercolation, 176 Use of 

 the powder in simple water solution, 177 Tea or decoction of 

 Pyrethrum, 178 Effect of Pyrethrum upon other insects, 179 

 Prospects for the use of Pyrethrum for the cotton-worm, 180 

 Ox-eye daisy powder and its uselessness as an insecticide, 180 

 Extracts and decoctions from various plants, 181 Difficulties in 

 the way of discovering new vegetable insecticides, 182 Mode of 

 preparing the extracts and diffusions, 183 List of the plants ex- 

 perimented with, 184 Effect of alcohol upon the worms, 187 

 Yeast ferment and fungus infection, 188 Dr. Hagen's recommen- 

 dations of the use of yeast as an insecticide, 188 Objections to 

 Dr. Hagen's plan, 189 Negative results obtained by the Com- 

 mission, 190. 

 CHAPTER XI: 

 Machinery and devices for the destruction of the worm. By W. S. 



Barnard, Ph. D 191 



