C O N S T R U C T I O N
O F
t i m b e r
E X P L A I N E D BY T H E MICROSCOPE;
B O O K L
O F THE CONSTITUENT PARTS OF T I M B E. R .
C H A R i.
OF THE NUMBER OF PARTS IN TREES, AND' THE WANNER IN WHICH THEV
ARE DISPOSED.
T ^ H E compofition of Wood is beft fcen in a Shoot of two years and a half P^^ATE
growth : and the moft diftinft and pleafing view of the feveral parts, as they J—
lie together, is to be obtained by placing a very thin llice, cut tranfverfely
from fuch a Shoot, before the fifth glafs of the refleiling Microfcope.
Greater Powers, and another Apparatus, will be required for the examination of
every part of this compolition, feparate} but before, we enter upon that enquiry, it
is beft to take this general view of all together.
The whole Slice confifts of feveral concentric Circles, of diiFerent fubftance j whh
veflels, alfo of different kinds, interfperfed among them.
The Parts are thefe :
1 . The RIND.
2 . The BARK.
3 . The BLEA.
4 . The WOOD.
5 . The CORONA, or C IRCLE OF PROPAGATION.
6 . The PITH.
C The f e