Hi all,
 Was particularly interested in the pendulum hinge; but, the photos don't=
=20
seem
to totally show exactly how they maintain position or their contact shape o=
r=20
the adjacent
"supports" they rest on. Indeed....the supports may well be glass but its=
=20
just a
guess, or, they are made of angled metal? I see no grooves in the supports=
=20
to keep
the hinge in its centralized placement. Perhaps the hinge contact points ar=
e=20
simply
like ball bearings?
 Has anybody seem the April issue of Popular Science magazine, where it
"hopefully" shows the seismometer"? If so, is it like the referenced
web page below?=20
 Take care, Meredith Lamb

 On 9/14/05, Larry Cochrane  wrote:=20
>=20
>=20
> FYI.. -Larry
>=20
> -------------------------------------------------------------------------=
--
> Hi Larry.
> With all the attention given to hurricane Katrina (and now, increasingly=
=20
> of Ophelia
> as it is battering the Carolinas) you may be interested in my latest=20
> paper, titled
> "Hurricanes and Earth hum", online at=20
> http://arxiv.org/html/physics/0509103
> The records for this paper were taken with my 'modernized conventional
> pendulum', some pictures of which are posted to this arxiv site. The=20
> pendulum was
> featured in the April issue of the Popular Science article titled=20
> "Affordable
> earthquake detector", concerned with last year's tsunami.
> Feel free to mention this research on the PSN mailing list if you so=20
> choose.
> Thanks for your interest and best regards,
> Randall
>=20
>=20
> .
>
Hi all,
 
Was particularly interested in the pendulum hinge; but, the photos don=
't seem
to totally show exactly how they maintain position or their contact sh=
ape or the adjacent
"supports" they rest on.  Indeed....the supports may we=
ll be glass but its just a
guess, or, they are made of angled metal?  I see no grooves in th=
e supports to keep
the hinge in its centralized placement.  Perhaps the hinge contac=
t points are simply
like ball bearings?
 
Has anybody seem the April issue of Popular Science magazine=
, where it
"hopefully" shows the seismometer"?  If so, i=
s it like the referenced
web page below? 
 
Take care, Meredith Lamb

 
On 9/14/05, =
Larry Cochrane <lcochran=
e@..............> wrote:

FYI.. -Larry
------------=
---------------------------------------------------------------
Hi Larry=
.

   With all the attention given to hurricane Katrina (and now=
, increasingly of Ophelia
as it is battering the Carolinas) you may be i=
nterested in my latest paper, titled
"Hurricanes and Earth hum"=
;, online at=20
http://arxiv.org/html/phy=
sics/0509103
      The records for thi=
s paper were taken with my 'modernized conventional
pendulum', some pict=
ures of which are posted to this arxiv site.  The pendulum was

featured in the April issue of the Popular Science article titled "=
;Affordable
earthquake detector", concerned with last year's tsunam=
i.
   Feel free to mention this research on the PSN mailing li=
st if you so choose.

Thanks for your interest and best regards,
  Randall

.