Jazz Age art by American Illustrator Clarence Coles Phillips. (1880-1927). Producing an endless stream of covers for various magazines, his work graced coffee tables from coast to coast.

Undated illustration. ca. 1912.
Undated illustration. ca.1912. In the public domain. via https://thevintagetraveler.wordpress.com/2014/05/17/a-young-mans-fancy-by-coles-phillips-1912/
Light consumes coal - Save light, save coal. 1917.
Light consumes coal – Save light, save coal. 1917. World War I era poster for the United States Fuel Administration. Poster. Wards & Deutsch Company, Chicago lithographers. Collection of the Library of Congress http://www.LOC.gov ID #2002712078. In the public domain. via https://commons.wikimedia.org/wiki/File:Light_consumes_coal_-_Save_light,_save_coal_LCCN2002712078.tif