Oh.
However, the Mg IS true SI; the tonne (sometimes spelled ton) is a 'tag'
(and a handy one) for the Mg [a bit like the litre - a convenient 'tag' for
the dm^3; the hectare - a 'tag' for the hm^2]
Duncan
-----Original Message-----
From: Gene Mechtly <[EMAIL PROTECTED]>
To: Duncan Bath <[EMAIL PROTECTED]>
Cc: Metric Forum <[EMAIL PROTECTED]>
Date: December 31, 2000 13:34
Subject: Prefixes for Mass
>On Tue, 26 Dec 2000, Duncan Bath wrote:
>
>> What about 7.5 Mg?
>Duncan,
> Forget Mg where there is almost no established traditional usage.
>7.5 tons (where one ton is *defined* as 1000 kg) is much better for *large
>multiples of the SI unit of mass (kg)*, in accord with established usage.
> Only for small submultiples of mass, e.g. for a few milligrams or
>micrograms, are prefixes applied to g (gram) preferable (where there is
>also long established usage).
>Gene.
>
