POMON A: Or, 
22 
FOR thereby we fhall be able to determine what Moifture is fuifficient 
for the Support of every Vegetable committed to our Care, and behold 
the great Beauties contained in their different Natures and Conftitutions. 
THE Experiment made by Mr. Hales on the Sun-Flower, (p. 4. 
' Vegetable Staticks) will give us a very great Help herein : It was then 
obferv’d, That the Space of Ground that its Roots occupied, evaporated 
fomething more than ten Pounds, and two Ounces, in the Space ee 
Days, and the Plant imbibed at the fame time 29 Pounds, therefore the 
Quantity evaporated and imbibed was 39 Pounds: And as the Roots 
occupied about four Cubical Feet of Ground, the Moifture wafted by 
Evaporation and Perfpiration, was more than the Earth would have 
evaporated (had-no Sun-Elower been planted in it) in the Space of 100 
Days and upwards. For as we allow one Pound of Water to be a 
Pint, the 39 Pounds are 39 Pints; and fince that one Pint contains 36 
Cubical Inches, therefore 39 contains 1404. 
| roa sa 
“= 
Product. 1404. the Number of Cubical dnchss 
| of Moifture wafted. from. four Cul ica | Feet i in 21 Days. 
“AN D fince chat the Surface or. fuperficial Content of four Square Feet 
(the Surface of four Cubical Feet) is equal to 576 Inches; therefore divide 
1404, by 576, and the Quotient will be 2 33 sci to +1, which is 
fomething more than 2 Inches in Depth, which requires more than 
100 Days for its Evaporation. 
144 ~ the Inches in the upper Surface of 1 Cubical Foot, 
Multiply’d by 4 the Number of Cubical Feet ; 
The Product 1 is 576 By. which divide 1404, 
576)1404(2 3 3. The Depth on four Cubical Feet ; 
isa = 
352 Retailer, atte to +s when reduced 
Now 
A iat adil rg cae 7 
TRE ere Serer Eee PMI Nota By deer 
