Date: Thu, 15 Apr 2004 14:01:55 -0600

Author: "Zigmund J. Peacock"

Subject: Re: Compass needle array


Gary, replace the top sheet of plastic and buff out the bottom with
Crest toothpaste you'll be surprised how good it will turn out [you can
use 600grit wet/dry paper for the bad spots first].
I did it with mine several years back. As for missing needles
students can iterate over a small area.
[Sorry Pasco] but their compass display is nowhere near as good as
the older unit you have. I purchased a replacent several years ago [10]
from Frey Sci, but they have stopped supplying them too.

Maybe I should build some of this obsolete but good stuff in retirement,
Hmmmmmmmmmm. Z

Gary Steinberg wrote:

> We have a compass needle array that is badly scratched up and
>missing several needles. See:
>I'm trying to find a replacement but can't seem to find a supplier. Does
>anyone know if these are still sold?

Zigmund J. Peacock
University of Utah/Physics
115 SOUTH 1400 EAST #201 Tel 801 581 6602
SALT LAKE CITY UT 84112-0830 Fax 801 581 4801

"We sleep safely in our beds because rough men stand ready in
the night to do violence to those who would do us harm"
-- George Orwell

"All that is necessary for the triumph of evil is that good
men do nothing!"
-- Edmund Burke

From Thu Apr 15 15:55:48 2004