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. 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. 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