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Re: [BRHSlist] Plumbago

To: <BRHSlist@yahoogroups.com>
Subject: Re: [BRHSlist] Plumbago
From: "Don Ross" <don0731@gte.net>
Date: Tue, 5 Aug 2003 01:53:10 -0500
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See what age does to memory.  The stuff we used came in a rope form.

----- Original Message ----- 
From: "John D. Mitchell, Jr." <cbqrr47@yahoo.com>
To: <BRHSlist@yahoogroups.com>
Sent: Monday, August 04, 2003 11:10 PM
Subject: Re: [BRHSlist] Plumbago


> True plumbago is NOT graphite. It IS a lead compound.
> The name comes from the Greek word for LEAD. It has
> the same root word as plumber, i.e. one who works with
> lead. The chemical symbol for lead is Pb. Many
> products used to contain lead as packing, etc. but
> powered lead was originally called plumbago. Later,
> the graphite,  in "lead" pencils, etc., began to be
> erroneously called "plumbago". I too, have used
> plumbago as a sealite on O2 bottles and that was
> powered red lead.
> John
> --- Don Ross <don0731@gte.net> wrote:
> > Plumbago was a packing compound using fibres and
> > graphite in its normal
> > useage around the railroad.  We used it for valve
> > packing quite a bit..
> > 


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