7. Portrait of a Seated Child with Hands Crossed, 1850s . J. Paul Getty Museum [ JPGM84.XT.1582.18 ]
8. Daguerre taught his process to Samuel Morse in Paris in 1839 . Morse took it to the U.S. and taught it to paying students in the 1840s. Thousands of photographers opened shops or traveled to rural areas and knocked on doors. Source: http:// www.pbs.org/wgbh/pages/roadshow/speak/dtype.html