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As my old dad says "there is nothing new under the sun" and here is an example printed in my Norton's Star Atlas and Telescopic Handbook from 1910 (see attachments). I purchased my first Norton's in 1966 and the sections on cleaning and caring for optics hasn't changed. In fact, subsequent editions haven't changed with regards to cleaning and caring for telescopes.
Last edited by UniPol; 19-06-2013 at 07:34 PM.
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