Bore into the trunk with a narrow-diameter hollow tube.
Extract it and eject the contents.
Then count the rings.
I saw this on TV.





"codex" wrote in message
news:nJwpd.7967$K36.3166@trndny03...
I'm interested in estimating the age of some live trees. I've found this
link: http://www.learner.org/jnorth/tm/leaf/HowOld.html, which gives a
"growth factor" for several species but is not comprehensive.

White Pine (Pinus strobus) and Eastern Redcedar (Juniperus virginianus)
are
two species for which I would like to find a "growth factor".