From: "Vladimir Galogaza" 
To: "ATM shore" 
Reply-To: "Vladimir Galogaza" 


>A sphere is indeed automatic. I friend of mine needed a good sphere,
>eight inch diameter, f3.2. After the thing was ground and polished I
>had him hand stroke on the turntable with instructions to go very
>slowly and keep the stroke short. He had never polished before, and
>took to it well. After about two hours with rouge he had a better than
>1/20 wave sphere from edge to edge.

It will be very interesting to know quantitatively what the
"thing" was after grounding and polishing and prior to rouge
treatment by your friend.

Without this the statement about "automatism of sphere" is not
well supported by relevant facts. If you handed to your friend an already
1/20 lambda sphere,
and scared him off of any aggressive handling, his use of rouge had perhaps
not produced perfect sphere but succeeded in not damage one he has already
got.

Vladimir.

--- BBBS/NT v4.00 MP