[compost_tea] Re: Mesh'd & Micron'd Out...

From: tomjasz <tom_at_livesoil.com>
Date: Thu, 25 Sep 2003 01:10:43 -0000

--- In compost_tea_at_yahoogroups.com, "Kirk Leonard" <kirk_at_o...> wrote:

If your supplier gave you a mesh table,

FIND A NEW SUPPLIER!

We should probably stay away from mesh, it's not a particularly
useful term as applied to filtering. Micron directly relates to the
OPENING, a value useful in determining what passes through


mesh
a traditional unit used to measure the fineness of woven products
such as fishing nets, fencing fabric, window screening, etc., equal
to the number of strands per inch. For n mesh fabric, the distance
between strands is 1/n inch or 25.4/n millimeter


micrometer (µm)
a common metric unit of distance equal to 0.001 millimeter or about
0.039 370 mil. The name micron is also used for this unit.


micron (µ)
a metric unit of distance equal to one millionth of a meter. "Micron"
is simply a shorter name for the micrometer. In 1968 the CGPM decided
to drop the micron as an approved unit and recommend that micrometers
be used instead. Microns, however, are still in common use.




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Received on Wed Sep 24 2003 - 22:59:01 EDT

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