The Black Lines are the lignous Body.
The several Shootings thereof betwixt the black Circles shew the Annuall Rings.
Fig. 17.
Sheweth a small piece of Oak cut athwart.
b The just bigness of it, as it appeareth to the naked eye.
bbbb The appearance thereof through a Microscope.
aaaa The greater Insertions visible to the bare eye.
The white Lines are the smaller Insertions only visible by the Microscope.
cccccc The greater Pores visible to the bare eye.
eeeeee The middle sized.