[ 15 ] 
had likewife great returns from potatoes manured 
with peat duft, or crumbled peat. A neighbour of 
mine, Mr. Sinciair, at Whitehoufe, informed me, 
from his own obfervation, that potatoes raifed from 
the /eed are inferior, as to fize and prolificacy, to old 
potatoes, for 6 or 8 years; but fuperior for 16 or 
20 years afterwards, not only to potatoes planted 
for a number of years in the fame foil, but to the firft 
crops from potatoes brought at a diftance. If this 
be fo, it makes the raifing of potatoes from the 
feed more than an objeét of curiofity. As to the 
having a variety of kinds from potatoe feed, I had, 
in 1795, from the feed of a white round potatoe, 
both round and long ones. And from the feed of 
black potatoes, I had black, white, pale-red, and a 
few clouded or fpotted. Jt is to be obferved, how- 
ever, that I found a number of potatoe-feedlings 
coming up in the neighbourhood of my experiment 
plot, from apples not killed by the fevere froft in the 
winter 1794. Some of them might have got into 
the plot itfelf, and deftroyed the accuracy of my ex- 
periment, which mutt, therefore, be repeated another 
year, in foil-where potatoes have not been. for- 
merly planted. | 
- The Poftmafter at Tarbert, a few miles from this 
place, aflured me, that potatoe-feedlings came up for 
five years fucceffively in his garden; and they have 
been found growing fpontaneoufly on the eftate of 
 Largie, at a confiderable diftance from any place 
where 
