Your history books will tell you that the advertising industry as we know it in was born in the 1920s. Your television will tell you that it really took shape in the 1960s. The Brooklyn Museum Libraries and Archives own several scrapbooks which show that some aspects of our modern advertising industry were born much earlier. The current Library display exhibition at the Museum Library includes one of these scrapbooks, a number of loose tradecards advertising various businesses, many of them in Brooklyn, as well as books and postcards.
Kids, animals, and pretty girls: amateur photography publications are full of them.
I recently discovered that it's been that way since the earliest years of photography. Because I trolled through a hundred or so of these publications for the current MoMA Library show "How to Make Good Pictures:" Manuals and the Popularization of Amateur Photography.