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Lighthouse Lenses

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Tony H:
Hi Guys

Found this when doing a Google search quite interesting

http://uslhs.org/assets/articles/article_fresnel_lens_1.pdf

Tony H in NZ

David E:
Thanks Tony. I've written quite a bit about optics, in particular lighthouse lenses, so this is an excellent piece to discover :D

I'll go through it later...

Tony H:
David

Glad you found this, here are two more, these are on Chance Glass but you may have seen these already.

http://www.search.revolutionaryplayers.org.uk/content/files/74/93/305.txt 

http://www.search.revolutionaryplayers.org.uk/engine/resource/exhibition/standard/default.asp?resource=2042


Tony H in NZ

David E:
Thanks, yes I was aware of Revolutionary Players - an absolute gold mine for historical researchers of the English Midlands' heritage. How did we manage without the internet? 8)

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