PSN-L Email List Message
Subject: Re: seismograph (?) on ebay
From: ChrisAtUpw@.......
Date: Tue, 14 May 2002 11:55:54 EDT
In a message dated 14/05/02, royb1@........... writes:
> I don't know what it is but it might be a seismograph-take a look.
> "Antique Earth Quake Seismograph ?? (1924)"
> Item # 1731468394
Hi Bob,
This is a fluid filled recording thermometer. Fluid in the large tube
expands, flows through the small bore tube and drives a metal bellows system
which drives the recording arm. There should be a clock somewhere to turn the
dial.
The other 'Antique Seismograph Jules Richard' No:870527673 is either a
recording thermometer or more probably a recording Hygrometer. I can't see
from the photo. Old meteorological equipment anyway.
Regards,
Chris Chapman
In a message dated 14/05/02, royb1@........... writes:
 
;I don't know what it is but it might be a seismograph-take a look.
"Antique Earth Quake Seismograph ?? (1924)"
Item # 1731468394
Hi Bob,
This is a fluid filled recording thermometer. Fluid in the large tube expands, flows t
hrough the small bore tube and drives a metal bellows system which drives the recording arm. There should be a clock somewhere
to turn the dial.
The other 'Antique Seismograph Jules Richard' No:870527673 is either a recording therm
ometer or more probably a recording Hygrometer. I can't see from the photo. Old meteorological equipment anyway.
Regards,
Chris Chapman
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