How many landscapes largely set the course for the graphic treatment of landscape until the end of the 19th century ?
Winther published a number of articles on photography in newspapers and published a book in 1845 titled : "" Instructions on how in various ways to produce and establish IMAGES OF LIGHT on paper , such as portraits of living persons , prospects of nature , copies of paintings , plastic copper items , stone prints , leaves of plants , etc. , partly by using a camera obscura , partly with an instrument for copying "" Portrait photography became more affordable and commonplace throughout the 19th century , and around 1860 landscape photography took root in Norway .