To: atm{at}shore.net, kennethdurkin{at}yahoo.com
From: tkrajci{at}san.osd.mil
Reply-To: tkrajci{at}san.osd.mil


>From: kenneth durkin 

>If all goes well this week, I will begin polishing my
>six inch F 4.5 mirror on the weekend.  I made a lap
>once before and had a terrible time keeping the
>channels from closing -- I was trimming them three or
>four times an hour and fighting a losing battle....

>...Texereau suggests that trimming is
>necessary far less often and I wanted to know if there
>are any caveats I should be aware of as I prepare my
>lap....

Yes, see Texereau, appendix J for the Twyman viscosity tester.  It's simple
to build and will help tell you if your pitch is too hard/soft. Then you
can either modify the pitch, or modify your room temperature...whichever is
more convenient.

>...Although it's summer here in Casablanca, I
>polish at night when the temperatures are cool.

How hot does it get in Casablanca?  It is hitting 35 - 38 centigrade
regularly in Taskhent, and sometimes getting into the low 40's.  Haven't
seen clouds for days....and won't for months.

Tom Krajci
Security Assistance Officer
US Embassy Tashkent, Uzbekistan

PS.  Any hello's you want to pass to our Consular Section in Tashkent?

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