[ 170 3 



of each quantity : in other words, that the fum of 

 the matter evaporated becomes gradually lefs ac- 

 cording to the length of time kept on hand, but 

 proves that the fooQpr the crop is brought to mar- 

 ket, ceteris paribus^ the greater is the advantage to 

 the farmer. 



N.B. The number of grains to a pennyweight in 

 the two laft experiments was omitted, or forgotten 

 to be regiftered. After the lofs fuftained in the 

 experiment No. 4 had been afcertained, the grain 

 was expofed a few minutes before the fire, and when 

 weighed again had loft three pennyweights. 



If fuch be the lofs in weight of grain, we may 

 conclude the potatoe, which evidently contains a 

 confiderable quantity of water, muft alfo fufFer by 

 evaporation, although its quality may by this lofs^ 

 be improved. 



Jug. lytb, 1789. Took a pint-eye potatoe, frefh 

 from the earth and well cleaned, which weighed 

 two ounces, nine dwts. and twenty grainsj the day 

 following it had loft twenty grains j two days after' 

 twenty-fix grains; in four days more thirty- one grains; 

 in ten days more, or at the end of feventeen days, it 

 had loft forty grains. But we obferve it loft as 

 much the firft day, as the laft fixteen; in three days^ 



fix 



