

E-text prepared by Albert László, Tom Cosmas, P. G. Máté, and the Online
Distributed Proofreading Team (http://www.pgdp.net) from page images
generously made available by Internet Archive (http://www.archive.org)



Note: Project Gutenberg also has an HTML version of this
      file which includes the original illustrations.
      See 38866-h.htm or 38866-h.zip:
      (http://www.gutenberg.org/files/38866/38866-h/38866-h.htm)
      or
      (http://www.gutenberg.org/files/38866/38866-h.zip)


      Images of the original pages are available through
      Internet Archive. See
      http://www.archive.org/details/evolutionofphoto00werguoft


Transcriber's note:

      Text enclosed by underscores is in italics (_italics_).

      Text enclosed by equal signs is in bold face (=bold=).

      Whole and fractional parts of numbers are displayed as 4-5/8
      for four and five-eights or as a decimal number. Several of
      the advertisements display another type of 'fraction' to
      represent shillings and pence: 1/1-1/2 for one