There are two types of illustration in the books - muted, figurative, almost bland drawings that tend to depict real life, and the tumultuous, textured, colour-saturated landscapes representing the imaginative world.
However, there remained many considerations within this format such as the type of illustrations, use of graphics and colour, and shape and size of the booklets [ 26].
Alfred Stieglitz denigrated his work, though with an odd note of respect, as "nothing more than the highest type of Illustration".
By the 1960s, Rockwell, whose wife had died, gave up the Saturday Evening Post to develop a different, more political type of illustration.
To streamline and promote the hobby in the early 1930s, Burdick developed the system for classifying cards by manufacturer and type of illustration.
There is a basic problem with this type of illustration of and support for the mechanical philosophy.
Indeed, the depiction of historical relationships among living groups as a pattern of branching predates Darwin; Lamarck (1809), for example, used a similar type of illustration (see Gould 1999).
Bruntjen writes, "although not the first colored aquatint book, [it] was the first major one, and it was to set an example for the type of illustration that was to enjoy widespread popularity in England for some forty years".
