138 STATE HORTICULTURAL SOCIETY. 



owing doubtless to its more thorough application. The result seems to depend 

 more on actual contact than upon amount of the powder. As I have sent to 

 Prof. Riley the full details of my extensive experiments for publication I will 

 not repeat them here. 



The significance of these facts is fairly startling. We have a cheap, non- 

 poisonous insecticide, by use of which noxious caterpillars are brought low, 

 beetles and their grubs exterminated, flies and their maggots put hors du com- 

 bat, plant lice overcome, parasitic lice — of course I mean those affecting sheep, 

 cattle, fowls, and other of our domestic animals — exterminated, house flies and 

 mosquitoes sent where mankind has long wished them, and were I in Kansas 

 I would add the bed-bug, that cruel old Cimex lectularius is no more. 



To apply this substance to insects which destroy vegetation, we can best mix 

 with water and apply with a fountain pump. To kill house flies we have only 

 to throw the dust about the room by use of a bellows. To destroy vermin on 

 our domestic animals we can wash them with the liquid mixture, or dust it well 

 through their hair, wool and feathers, and as in case of close rooms like poultry 

 houses, fill the room with the dust. 



Mr. Collar, Adrian. — Will pyrethrnm powder effect curculio? 



Prof. Cook. — I have no doubt but it will, but for this purpose at present 

 prices it would be an expensive remedy. 



Dr. Lockwood. — Where can we obtain this powder? 



Prof. Cook. — I cannot tell you where you can surely obtain a pure article at 

 present, but I doubt not very soon it will be in the markets. 



Mr. Saunders. — I have no doubt but the pyrethrurn may be grown success- 

 fully in our own country, but not at six or seven cents per pound, as suggested in 

 the paper. In Dalmatia, where the kind of labor required in its production is 

 exceedingly cheap, they cannot produce it in the largest quantities at that 

 figure. We may expect to pay, I think, seventy-five cents or one dollar per 

 pound at retail, and then be satisfied. For although I have not reached as 

 satisfactory results in my experiments as Prof. Cook, still I believe it promises 

 to be the best insecticide I know, always taking into consideration the safety 

 in employing it. Cinerar ice folium is more effective than either roseum or car- 

 neum. Mr. Saunders spoke in some detail concerning the production of Lon- 

 don purple (a full account of which is given in the Secretary's portfolio), and 

 said we could not impress too strongly the necessity of caution in using these 

 poisonous compounds. 



W. W. Tracy, Detroit. — I bought pyrethrurn powder at three different drug 

 houses, and two out of the three times succeeded in getting effective powder; 

 so I think we can even now run a pretty good chance of getting the pure 

 article. 



W. C. Latta. — In using the powder on cabbages, to drive away the worms, 

 we did not succeed wholly ; there were some worms left. 



Prof. Cook. — Yes, this will be the case, but the cabbage is a bad thing to 

 permeate with the powder. Still we had on the whole very excellent success; 

 but very few of the worms remaining. 



Tuesday Afternoon. 



At 2 o'clock the delegates in attendance met at the University main build- 

 ing, and after shaking hands with Dr. Frieze and a number of his associates 

 from the Faculty, proceeded through the various buildings, enjoying a rich 

 treat under the guidance of Dr. Frieze. 



