[ 334 
weight, I prefume, is that which chiefly conftitutes 
its value. I have known 1-4th part to have been 
produced, or 56lb. from a fack of 224]b. corref- 
ponding in fome fort with what I have heard from 
many poor labourers, that a fack of potatoes is of 
more value, as an article of food.in their families, 
than a bufhel of wheat. A crop of 200 facks of 
potatoes hath been produced from an acre of ground; 
and I am perfuaded, that in general it is more eafy 
and certain to raife roo facks, than 25 bufhels of 
wheat on the like quantity. 
I remain, fir, 
Your’s moft fincerely, 
NEHEMIAH BARTLEY. 
[N.B. The offer of Mr. BARTLEY, with regard to the 
potatoes raifed from feed, was partly accepted; but the 
quantity had been accidentally diminifhed and injured in his 
cuftody—and the parties to whom the remainder were given 
for experiments, having failed to tranfmit accurate accounts, 
no experiments worth notice could be recorded.—But the 
following letter, which purfues the fame aa sh renders it 
ftill more important.—Ep, ] 
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