>Dear friends,
A friend of mine has been intrigued by how the old lacemakers lamps
actually worked - you know the candle behind the glass sphere filled
with distilled water. He put this problem to a scientists friend who
replied with this formula. It's way beyond what I can remember of
maths. I just hope it appears on arachne as I see it here.
David in Ballarat, AUS
>>I think if you put some water in the bowl you'd get something like this:
>>
>>T = \int _{(r_{1},\theta_{1})}^{(r_{2},\theta_{2})}\frac{n(r)}{
>>
>>
>>Making it a Luneburg lens...
>
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