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  1. more more on Email In the 18th Century · · Score: 2, Informative

    http://www.sciamdigital.com/index.cfm?fa=Products.ViewIssuePreview&ARTICLEID_CHAR=253EE806-FA7B-4693-8F1D-BDBB1E68AAF is an article i wrote many moons ago for scientific american on these optical telegraph networks more info still, in this book: http://spinroot.com/gerard/hist.html