51 Vegetable Staticks. 



fo dry and dufty, as to be unfit for vegeta- 

 tion I weighed it, and found it had loft 

 6 pound -f- ii ounces, or 194 cubick in- 

 ches of water, near f part of its bulk. 



Some days after, the fecond cubick foot 

 being dryer than either the firft or third, was 

 decreafed in weight 10 pounds. 



The third cubick foot, being very dry and 

 dufty, had loft S pounds -}- 8 ounces, or 247 

 cubick inches, viz, j part of its bulk. 



Now fuppofing the roots of the San-flower 

 (the longeft of which reached 15 inches 

 every way from the ftem) to occupy and 

 draw nourifliment from 4 cubick feet of 

 earth, and fuppofe each cubick foot of earth 

 to afford 7 pounds of aioifture, before it be 

 too dry for vegetation s the Plant imbibing 

 and perfpiring 22 ounces every 24 hours, that 

 will be 28 pounds of water, which will be 

 drawn off in 21 days and 6 hours 3 after 

 which the Plant would perifh, if there were 

 not frefia fupplies to thefe 4 cubick feet of 

 earth, either from dew or moifture arifing 

 from below 15 inches (the depth of the 

 roots) up into the earth occupied by the 

 roots. 



Ex- 



