The Potatoe Plague. 69 
Rounp Reps. 
Year. Seed taken up. | Quality of crop-| Quantity of crop. 
1840 Ripe, supposed | Curled Failing crop. 
1841 Unripe No Curl | Good crop. 
1842 Unuipe No Curl | Good crop 
1843 Ripe Curled Indifferent crop 
1844 Unripe No Curl | Good crop 
Brack Kroneys. 
1841 Ripe, supposed |Curled Failing crop 
1842 Ripe Curled Light crop 
18438 Unripe No Curl Capital crop 
1844 {| Ripe si Much curled) Very ba d cro 
Had the above results been obtained by experience con- 
trived for the purpose, they could not have borne more direct- 
ly on the point in question, as we find in the wet summer of 
18438, and the extraordinary drought of 1844, as well as in 
the average seasons of 1841 and 1842, it acedentally hap- 
pened that part of my potatoe crop was grown from ripe, and 
another part from unripe sets, and in every case with success 
from the one, and failure from the other; thus showing that 
the seasons could not be blamed as the cause of curl. To 
make these instances still more conclusive, it also happened 
that each of the two very different kinds of potatoes named 
were alternately affected by or free from curl; thus showing 
that it was nota peculiarity belonging to a particular kind 
of potatoe. 
Thus far I have detailed my own experience only ; but 
when it first occurred to me that over-ripening of the set was 
the cause of the curl, I naturally became anxious to compare 
the experience of others with my own, and make many in- 
quiries on the subject from other potatoe growers. The 
information thus received still more strongly confirmed me 
in my previous opinion, and I select one or two of the cases 
