Ree Oct 29 



Octob.26, 1879 



Honorable Doctor, 



Your papers about oak-trees arrived here a few days ago. Your gift for which I 

 am very grateful has been ofessential help to me. I saw immediately by the first 

 comparison that I now will have a much better way oforganizing the beech-trees. 



Mr. Meehan has sent me stalks of Yucca. It is not just the moths and their 

 pupae in them but a new and far more interesting thing- the larvae ofa Russell- 

 beetle. Allow me to introduce to you my proposal to infect harmful insects with 

 yeast- fungus and to give the Utile article to him. 



The first experiment in several different setting did not go well as I had 

 predicted. But now the second one which was performed on the Stettin islands 

 has been completely successful.. 



Potato bugs (Zeil partheni) were collected at the same time and 

 kept in the same environment. One group was sprayed on three consecutive 

 days with diluted yeast spores and on the day all were dead . 



Nothing was done to the second group and they still live happily. 



Unfortunately the dead bugs were not sent to me until they were all dried 

 out Thus I could not demonstrate spores of fungi in the carcasses. 



The epithelium was diseased In the larger vessels of the wings and 

 half destroyed. 



The main thing is that the bugs were dead as a result of the 

 spraying; I will certainly find the fungi in animals that are not yet dead. 



Ifyou regard this as important as it seems to me to be so promise me to 

 encourage more gardeners to do the experiment. I have hopes to have found a 

 simple effective eure against Phylloxera, Aphids and Corrus in Wammshausen. 



With this I ask you to recommend me to your wife, daughter and 



son 



Yours 



H.A.Haqin. 



