BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 245 



1736. EILEY. C. V. Coutisued. 



12. REMEDIES : MEANS OF COPING WITH THE INSECT Continued. 



The Ewing brushing machine, 50 The Helm brushing machine, 

 51 The Wood- Smith brushing machine, 52 The Iske brush- 

 ing machine, 53 Use of kerosene and coal oil with shallow 

 pans or cloth frames, 54. 



Poisoning the worms 54 



Impetus given to invention by the use of mineral poisons, 54 

 Value of concerted action, 54 General principles to be ob- 

 served in poisoning, 55 Dry vs. wet applications, 55^-Advant- 

 age in being prepared, 55. 



Arsenical compounds 55 



Their value, 55 Safe and harmless where carefully used, 55 

 Caution necessary, 56 Antidote to arsenic poison, 56 Paris 

 green, 56 When first recommended against the cotton-worm, 

 56 Its value, advantages, and disadvantages, 56 Modes of 

 using it, 57 Patents issued for Paris green mixtures, 57 They 

 should be disregarded, 58 Arsenic, 58 It causes the squares 

 to fall, 58 Patent granted for its use in 1871, 59 Johnson's 

 dead shot, 59 Arseniate of soda, 59 Texas cotton-worm de- 

 stroyer, 60 Lodi pest poison, 60. 



London purple 60 



Its nature, and how produced, 60 Its efficacy as an insecticide, 

 60 Analysis of, 60 It proves a valuable poison for the worms, 

 61 Cheaper than Paris green, 62 Its persistency, 62. 



Pyrethrum po wder 62 



Its origin and nature, 62 Its remarkable insecticide qualities, 

 62 Most effectual on the cotton-worm, 63 Perfectly harmless 

 to man, 63 The extract of the plant has the same virtue, 63 

 Growth of the plant in California, 63 Experiments conducted, 

 64 The alcoholic extract very potent, 64 Probable cost of 

 using it, whether as powder or extract, 65 Highly encouraging 

 prospects from its use, 65. 



Kerosene oil 65 



It causes instant death to the worm, but is difficult to apply 

 without injuring the plant, 66 Vaporized by means of steam, 

 66 Used as a soap. 66. 



Cotton-seed oil 66 



Acts much as kerosene, 66 Made into soap with ashes from hull 

 of seed, 66 Might be profitably used around oil factories, 66. 



Carbolic acid 67 



As a means of keeping off' the moth, 67 Will not kill the worm 

 without injuring the plant, 67. 



Sulphur 67 



Extracts or decoctions from various plants 67 



Yeast ferment ; fungus infection 68 



Proposition by Dr. Hagen, 68 Dr. Bail's experiments, 68 Not 

 in accord with the leading mycologists, 68 Experiments with 

 beer-mash, 69 With beer-mash and yeast ferment, 70- 



Machines and contrivances for powdering 74 



Simple contrivance for mixing, 74 Ordinary method of apply- 

 ing dry poison, 75 Patented machines, 75 Hand duster, 75 

 The Willie duster, 75 The Kurd blower, 76 Combined duster 



