C 2O0 ) 
The third fort of rifing Veffels are very fmall and in 
great number, being nriade alfo of very thin Skins^ as Fig* 
4. P where they are drawn longways. 
All thefe afcending Veffels in the aforefaid piece of 
Wood, which is about of a Square Inch, are I guefsa* 
bout a opcQ Veffels, Hence in an Oak Tree ot four foot 
Diameter are 3 200 Millions of afcending Veffel?, and in 
one of I foot, there are 200 Millions ot Veffels. iFwe 
fuppofe 10 of thefe great and fmall Veffels i n a day to carry 
up I drop of Water, and that 100 of thefe drops make one 
Gubick Inch, there will be 200000 Cubick Inches. Thefe 
Inches reduced to feet, amount to full 1 15 Cub'ckfeeiof. 
^^inland meafure, of 12 Inches to the foot 5 and one Cu- 
bick foot weighing 65 lib. of our 2)^^Z> water, the whole 
will amount to 7475 lib. or 14 Bordeaux Hogflieads of 
water, which a Tree of one foot Diameter in one day can 
bring up. Whereby it appears , that how fmall foever 
the Quantity of water is which a Pipe or Veffel may be 
fiippofed to carry up, yet if all the Veffels were imployed 
to that ufe, how much the Total would amount to . But 
I conceive that feveral of thefe Veffels convey of the fame 
moifture downwards again to the Root* andfb caufe a Cir- 
culation : as I have formerly faid» 
Thefe foreraentioned uprifing Veffels empty conftantly 
their Sap into an incredible number of Veffels, which lye 
Horizontally in the body of the Tree, to caufe a continual 
growth in thicknefs. Eig. 2, G G G are a fort of Veffels 
v'hich run Horizontal, beginning from the Pith of the 
Tree J but afterwards in great numbers taking their rife 
f om the afcending Veffels. Thefe Veffels appeared to 
me like dark ftreaks running crooked, and winding for the 
snoft part along the fides of the great VeffeU. Toobferve 
thefe Veffels better, I caufed the Wood to be cut in length 
in fuch manner that I came to divide the faid Veffels a-crofs 
yi?ry neatly, Thefanae Vefsels lye not above 5, 6, or/ 
one 
