[ATM] light weight mirrors

[horace r davis <hrd9@juno.com>]

I am looking for people that would like to share information on
developing new low cost large light weight mirrors
My idea is 1 inch front thickness  for 20 inch dia with a ribs 2 inch
high but must line up with flotation cell. 1.25  inch thick for 24 inch
dia with a ribs 2.5 inch high and 1.5 inch thick for 32 inch dia with a
ribs 3 inch high. It looks  like the glass will need to be fused to the
ribs from the information I have got from the ATM sits. The cost of
mirrors and weight of telescopes is hampering the number of large scopes
in the ATM world we can change that. 
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