Photogravure, by Henry R.
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   Thanks to Chris Curnow and the Online Distributed
   Proofreading Team at [2]http://www.pgdp.net (This file was
   produced from images generously made available by The
   Internet Archive)
   Many thanks
   Janet

References

   1. http://www.gutenberg.org/3/6/4/4/36446
   2. http://www.pgdp.net/