thanx & nicely done lowell

& i would just like to add or reiterate the data & considerations in
messages 11300 & 11303
& to congratulate you for showing a displacement on a scale already
far greater than i had originally estimated

but now that we have reached 5 inches
i have to wonder
why stop there
since there is no reason to assume a pivot
& every reason to suppose the tree roots have displaced not only the
top of the stone but its entirety & thus also the bottom of it
being only 30 to 36 inches below grade

so i would guess again that the center of the marker top now occupied
by the brass disk has moved at least 5 inches in these 108 years but
very possibly more than 5 inches

hows that for stretching my own mind

& the maximum possible displacement is indicated by no less than the
present position of the center of the tree trunk

but i believe any better guess at this point would require
dendrochronology

--- In BoundaryPoint@yahoogroups.com, "Lowell G. McManus"
<mcmanus71496@m...> wrote:

> Earlier today, I wrote:
>
> > The photo with James posing at the monument (

www.mexlist.com/bp/james.jpg )

> > shows that the stone has obviously been displaced from the

vertical by the

> large
> > root that wraps around it. The yellow lines indicate a rough

guess as to the

> > actual location of the boundaries, but it's hard to tell without

knowing the

> > depth of the stone in the earth.
>
> Now, with the information from Van Zandt that the monument is 48

inches long and

> my measurement of a six-degree tilt, I can calculate that the tree

root has

> moved the center of the brass disc five inches into Texas. To

arrive at this, I

> assumed that the monument pivoted from its bottom end, which would

likely have

> stayed put as the top was pushed westward. To calculate the

distance of its

> departure, I multiplied the length of the monument by the sine of

its bearing.

> It comes out to almost exactly five inches, which is as accurate as

possible

> using a protractor and a hand level to measure the angle.
>
> Lowell G. McManus
> Leesville, Louisiana, USA