42 BOARD OF AGRICULTURE. [Pub. Doc. 



trate my meaning. A glance at this section shows that it has 

 a watery streak through tiie middle. Instead of saying there 

 is no potato raised but what is equall}^ good all the way 

 through, I will say there is no potato raised that is uniform 

 all the way tlii-ough. You simpl}^ had, in that variety, a far 

 greater degree of diiferentiation. But the more fundamental 

 question, of course, is, whether there are such varieties to- 

 day ; and I can't answer that. I do not know of any. 



Mr. Sessions. In those days they raised enormous crops, 

 — greater than anj^thing we can count on now, I think. 



Mr. E. Cyrus Miller (of Haydenville) . AVill the 

 speaker enlarge upon the varieties of apples which have been 

 found resistant to diseases, and also the eifects of cultiva- 

 tion and fertilization, relative to existing qualities in such 

 apples ? 



Professor Jones. I will simply say that very little has 

 been learned upon that subject, so far as I know. My as- 

 sistant has been working upon this matter, and has in con- 

 nection with it received advice from nearly every State in 

 the Union. As yet very little has been definitely recorded 

 that is of practical value as to the relative disease resistance 

 of apples, and as to the possible relations of climate and 

 culture. 



Mr. Miller. Do you know whj^ the one variety is more 

 susceptible to the scab than another? 



Professor Jones. No ; and we d(^n't know wh}^ there is 

 such a difference as I have described in potatoes. We are 

 trying, however, to find out in the case of the potato. We 

 find that one variety of potato resists rot, and another will 

 rot badl3^ The Early Rose is a bad rotter ; the German 

 varieties resist. The difference may be in part in the char- 

 acter of the potato skin ; but certainly it is not all there. 

 Here is evidence in point. I am holding up for your inspec- 

 tion two glass tubes containing growths of the rot-causing 

 fungus. Note that in one it is making a rank growth ; that 

 is where it is growing on a piece of Early Rose potato. In 

 the other the groAvth is weak ; that is growing on a piece of 

 one of the German varieties. It is evident, therefore, that 

 there is something in the flesh of that German potato that re- 



