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Text File  |  1996-04-10  |  576b  |  11 lines
  1.      and delight. It became a pastime among the well-to-do 
  2.      throughout Europe.
  3.           By the 1600s, painters in many countries were 
  4.      using it to solve problems of perspective. Some artists 
  5.      found it easier to trace the two-dimensional image of the 
  6.      camera obscura than to work from three-dimensional 
  7.      reality.
  8.           The next step was obvious. Could the image be 
  9.      preserved, saving the artist even more work? The idea 
  10.      seems to have been present for two centuries, awaiting 
  11.      the development of chemistry‚Äîand of demand.