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A Plea for Reflectors
Actually, just to expand the posting below, I am also interested in purchasing a book by John Browning titled "A Plea for Reflectors", there were may editions during the latter part of the 19th century.
I'm also after any other books that deal specifically with telescope manufacturers during 1860-1890, hopefully such a book would include references to John Browning who was a prolific manufacturer in that era.
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