NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Units and area. was: gipsy moth iv
From: hellos
Date: 2006 Jul 18, 10:09 -0500
Zed, in the States you have to be careful when you talk about "mils". They are
our smallest unit of currency (thousandth of the dollar, which has never been
coined as far as I know, but is used in commercial bulk trade) and they are also
"thousandths of an inch". If you go to a machine shop and ask them to take eight
mils off an engine block, they will shave it down eight thousandths of an inch.
We also measure polyester films (recording tapes, transparent overlays,etc.) and
paper stocks in the same mils, thousandths of an inch. IIRC "post card stock"
must be at least seven mils thick by government requirement and matchbook covers
were 32 mils thick, although the memory is faded and probably a bit off. (I
don't plan to get my calipers out to confirm that.<G>) Printers use their own
odd paper weight system but still used mils for the jobs that required it.
----- Original Message -----
From: "Zed" <packeteer@gmail.com>
To: <NavList@fer3.com>
Sent: Tuesday, July 18, 2006 4:47 AM
Subject: [NavList 811] Re: Units and area. was: gipsy moth iv
>
> fyi: for 60 cm most people I know of would say 600 mil (short for millimeters)
>
> I think that way of describing length comes from the construction
> industry. And I think they use mil because its shorter than saying
> centimeter.
>
>
> > And here you have a system which, in its usual nomenclature and usage,
doesn't
> > allow for a simple TWO feet, but forces users into SIXTY centimeters? Sorry,
> > George, but that's simply trying to enforce a system onto organisms that
don't
> > have a natural inclination to use it.
> >
>
> >
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.394 / Virus Database: 268.10.1/390 - Release Date: 7/17/2006
>
>
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To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
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From: hellos
Date: 2006 Jul 18, 10:09 -0500
Zed, in the States you have to be careful when you talk about "mils". They are
our smallest unit of currency (thousandth of the dollar, which has never been
coined as far as I know, but is used in commercial bulk trade) and they are also
"thousandths of an inch". If you go to a machine shop and ask them to take eight
mils off an engine block, they will shave it down eight thousandths of an inch.
We also measure polyester films (recording tapes, transparent overlays,etc.) and
paper stocks in the same mils, thousandths of an inch. IIRC "post card stock"
must be at least seven mils thick by government requirement and matchbook covers
were 32 mils thick, although the memory is faded and probably a bit off. (I
don't plan to get my calipers out to confirm that.<G>) Printers use their own
odd paper weight system but still used mils for the jobs that required it.
----- Original Message -----
From: "Zed" <packeteer@gmail.com>
To: <NavList@fer3.com>
Sent: Tuesday, July 18, 2006 4:47 AM
Subject: [NavList 811] Re: Units and area. was: gipsy moth iv
>
> fyi: for 60 cm most people I know of would say 600 mil (short for millimeters)
>
> I think that way of describing length comes from the construction
> industry. And I think they use mil because its shorter than saying
> centimeter.
>
>
> > And here you have a system which, in its usual nomenclature and usage,
doesn't
> > allow for a simple TWO feet, but forces users into SIXTY centimeters? Sorry,
> > George, but that's simply trying to enforce a system onto organisms that
don't
> > have a natural inclination to use it.
> >
>
> >
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.394 / Virus Database: 268.10.1/390 - Release Date: 7/17/2006
>
>
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---
