Re: [ATM] Spherometer & Hogging with Diamonds

["Bob May" <rmay@nethere.com>]

True about that but you're not putting the center measuring point
at the edge which is where the measurement is being done.  There
is a difference in doing it that way.
Bob May

rmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net

----- Original Message -----
From: Dale Eason <atmpob@yahoo.com>
To: Bob May <rmay@nethere.com>
Sent: Saturday, March 15, 2008 5:40 PM
Subject: Re: [ATM] Spherometer & Hogging with Diamonds


> You don't have to have a ring on the Spherometer to
> measure to the edge of a mirror.  A three point one
> works just as well.  Think about what happens when one
> of the legs is raised or lowered compared to all of
> the others.  You will see the reading change won't
> you.
>
> Dale Eason
>
>
>
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