15fi TRANSACTIONS OF THE ILLINOIS 



and it is to be hoped that our investigators will soon be able to extend 

 their observations over the whole circuit of our latitude, both by sea and 

 land, for. in mv judgment, no causes or periods can be fully investigated 

 or settletl until that is done. 



Dr. Taylor — It has seldom been my privilege to listen to so able a 

 paper as that which has just been read by Prof. Turner. I believe the 

 public will be glad to see it in print, and I move, sir, that the Secre- 

 tary be instructed to send copies of this address to the Inter- Ocean and 

 New York Tribune for publication. Carried. 



DISCUSSION ON PROF. BURRILL'S ESSAY. 



Dr. Warder — I am under great obligation to Prof. Burrill, for this 

 paper which he has read before us. The subject treated is important and 

 full of interest to the horticulturist. The Doctor proceeded to relate a 

 little of his experience in this matter of fungoid growths in Kentucky, but 

 your reporter failed to get a clear understanding of this matter, and dare 

 not venture to report his words, for fear of misrepresenting him. 



Mr. Wier — Some six or seven years ago I took up the study of mon- 

 ogamic life, and followed it up for two summers with a good deal of in- 

 terest. But I found it was too big a task. I had not time to devote to 

 the matter, and pretty much dropped it. I found out some things. For 

 instance, I found that fungus upon the apple trees could be destroyed by 

 the use of the sulphite of lime, and that this remedy appears to be a 

 specific. The leaves are first affected, and I have thought for four or five 

 years past that pear blight has its beginning in the blight of the leaf; 

 indeed, I have never seen a pear orchard that had leaf blight, that did 

 not afterward have the regular pear blight. 



Prof. Burrill — I have, for the past year or two, given a good deal 

 of attention to the subject of pear blight, and its relation to leaf blight, 

 but I have learned nothing ; I am just as ignorant now as when I com- 

 menced my investigations. I have found out nothing respecting the 

 cause of the disease, or any thing that seejns to be a cause. 



With reference to the peach rot, we know that it starts upon the leaf. 

 If the fungus upon the leaf of the peach is put upon a healthy peach, it 

 will soon rot it. 



Mr. Wier — That is the notion I have had of the pear blight; that 

 it attacks the leaf first and afterwards the wood. 



Dr. Humphrey — I dislike the expression — that fungus attacks differ- 

 ent kinds of vegetables and fruits. I think different kinds of vegetation 



