PARIS GREEN : MAY BE SAFELY USED. 31 



difficulties, Messrs. Rumsey & Co, have made, at my suggestion, a 

 flattened nozzle pierced with six minute apertures, as 

 represented in Fig. 10, by means of which line streams 

 can be thrown to the tops of apple-trees, distributing the 

 liquid most economically, and in the form which seems 

 to be the most favorable for the spreading and adherence 

 of the poisons. The nozzle may be applied to any of 

 their pumps, and is to be obtained by application to the 

 Fig. 10.— Noz- Company. 

 Paris green "an! Several morc complicated sprinklers have been patented, 

 fru'i?Tnd'''other "^^^^ ^f which Were specially devised for use in cotton 

 *'"'"^^- plantations. The U. S. Entomological Commission 



mention, with more or less full description and illustration, no less 

 than twenty of these sprinklers and atomizers.* The complication of 

 structure displayed in some of these serves to show the inventive talent 

 and mechanical skill called in requisition in order to attain the most 

 practical and economical method of protecting large areas of vegeta- 

 tion, by means of poisons, from insect destruction. 



No danger in properly using- the poison. — Paris green has not 

 gained its popularity as an insecticide without opposition in many quar- 

 ters. Several of our scientific men have protested against so free and ex- 

 tensive use of the poison, predicting that grave results would follow. 

 The experience, however, of more than ten years has shown that the ap- 

 prehended danger has not been, nor will be, realized. It is now believed 

 by those who have given the subject the closest study, that with proper 

 precaution, and in obedience to directions, it may be used with entire 

 safety. The following precautions should always be taken : 



The poison should be kept in a safe place and plainly labeled, 



" POISON." 



Do not distribute the powder with the hand, as is sometimes done. 

 An abrasion of the skin might result in serious harm. 



Apply the powder with the wind, if any, so as not to breathe it. 



Do not use it upon leaves or fruit which are soon to be eaten, or 

 where it will not be washed away by repeated rains (as on cabbage, 

 cauliflower, etc.). 



Prevent animals from feeding on poisoned vegetation, and poultry 

 from eating the poisoned insects. 



Test the strength of the poison upon a few plants first, lest it may 

 be too strong for the leaves. 



Use it of no greater strength than is necessary to kill the insects. 



Make such change in crops that its use upon the same ground may 

 not be continued for many years. (Perhaps not important.) 



^Bulletin Ko. 3. The Cotton Worm, by Chas. V. Riley, M. A., Pli. D., IBSO, pp. 77-97, 



