Hi all,

Haven't yet tried such; but it is obvious that there are various size glass
round balls
around that could (?) be tried as a dual spaced pivot part of a seismo
hinge. The
contact surfaces for such could also be a flat glass, or of course, a
variety of other
materials. Probably for weight pressure limitations they may best work for
S-G's
(vertical hanging mass pendulums), with lighter overall boom/mass weights.

"Minature glass marbles" (~2-3mm, 75-125 thousandth inch diameter estimate)=
,
on
E-Bay, let alone a variety of the other larger glass diameter marble sizes.
Glass
beads with a hole through them, and jewelry balls of a variety of colors in
earrings;
including some false pearl, which was actually a similar colored glass bead=
s
I found.

It may not be as farfetched as it sounds, as from examining some of my wife=
s
items
with a jewelers loupe, the surfaces in most cases, seemed more uniform
consistent
without near as many very small pits/marks/grooves as similar size metal
ball bearings.
Of course, the diameters will likely vary more with glass than metal, and i=
s
likely to not
be as strictly or consistently as round in shape. Earlier table top/edge
tests with various
glass surfaces didn't show any visual wear, for the various ~2 pound
boom/mass
configurations I've tried in the past.

Maybe the next time I go shopping with her, I'am be alittle too enthusiasti=
c
to go visit
the (cheap) jewelry racks; which will likely bring some initial bewildered
disbelief
from her...ha.

Take care, Meredith Lamb
Hi all,



Haven't yet tried such; but it is obvious that there are various size glass=
 round balls

around that could (?) be tried as a dual spaced pivot part of a seismo hing=
e.  The

contact surfaces for such could also be a flat glass, or of course, a varie=
ty of other

materials.  Probably for weight pressure limitations they may best wor=
k for S-G's

(vertical hanging mass pendulums), with lighter overall boom/mass weights.<=
br>


"Minature glass marbles" (~2-3mm, 75-125 thousandth inch diameter=
 estimate), on

E-Bay, let alone a variety of the other larger glass diameter marble sizes.=
  Glass

beads with a hole through them, and jewelry balls of a variety of colors in=
 earrings;

including some false pearl, which was actually a similar colored glass bead=
s I found.



It may not be as farfetched as it sounds, as from examining some of my wife=
s items

with a jewelers loupe, the surfaces in most cases, seemed more uniform cons=
istent

without  near as many very small pits/marks/grooves as similar size metal b=
all bearings.

Of course, the diameters will likely vary more with glass than metal, and i=
s likely to not

be as strictly or consistently as round in shape.  Earlier table top/e=
dge tests with various 

glass surfaces didn't show any visual wear, for the various ~2 pound boom/m=
ass

configurations I've tried in the past. 



Maybe the next time I go shopping with her, I'am be alittle too enthusiasti=
c to go visit

the (cheap) jewelry racks; which will likely bring some initial bewildered =
disbelief

from her...ha.



Take care, Meredith Lamb