[OM] Radioactive lenses again

[Wayne Harridge]

Dear Zs,

Have a look at the following URL for a good discussion of the use of thorium in 
lenses:

http://home.earthlink.net/~michaelbriggs/aeroektar/aeroektar.html



Wayne Harridge

http://members.optusnet.com.au/~w_harridge

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