[time-nuts] Remove Pictic boards from envelopes
alan.melia at btinternet.com
Tue Aug 10 23:12:47 UTC 2010
Hi Jim ...being "ironic"...see the "smiley"
----- Original Message -----
From: "jimlux" <jimlux at earthlink.net>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Tuesday, August 10, 2010 11:55 PM
Subject: Re: [time-nuts] Remove Pictic boards from envelopes
> Alan Melia wrote:
> > Pencil?? only us oldies know what that is....... it is surprising the
> > pencil hasn't been banned under RoHS :-))
> > Alan G3NYK
> I don't know that "lead" (as in the element) has ever been used in
> pencils.. I read a fascinating book on the history of the pencil a few
> years back.. it described how graphite (the mines of Cumberland were
> famous for graphite with good writing/drawing properties) was called
> plumbago (lead ore) because chemical analysis didn't really exist and
> the dense black substance seemed to resemble lead.
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