Re: ATM (Whack Test)Plate mirror warnings

["Frank Ward" <thewards@mindspring.com>]

There's another thread going on right now.
In hopes of saving bandwidth lets combine
them

Subject: ATM Dumb and Dumber Plate Mirror Warnings.


FW
----- Original Message -----
From: Doug Tanaka <dtanaka@seanet.com>
To: <atm@shore.net>
Sent: Wednesday, March 14, 2001 4:04 PM
Subject: RE: ATM (Whack Test)Plate mirror warnings



> If there were a brave soul in the group, they could try making say a 6
>inch plate glass mirror, polish it to a sphere, then give it a walloping
>good whack with a rubber mallet. Then test it again. That could be an
>interesting experiment.

What about hitting the plate glass before grinding begins?  It would seem to
me that if there was a question as to the integrity of the glass, this would
answer it before any labor was wasted.  If a bump was going to change the
figure after figuring, perhaps it would do it before.

Doug Tanaka