This United States Steel advertisement describes the technological advancement that essentially doubled the gun barrel production capacity as well other technological breakthroughs.
The drawing puts the viewer in the gun sight of a U.S. marine rifleman.
Pg. 57
The artist is Ernest Hamlin Baker (1889-1975) was a self-taught illustrator who rose to extraordinary prominence in his field. In a 17-year tenure with
Time, he illustrated more than 300 of the magazine's covers, including many for "Man of the Year" issues. He also produced 11 covers for
Fortune and participated in several Works Progress Administration projects during the Great Depression.
http://www4.colgate.edu/scene/may2002/drawing/http://artcontrarian.blogspot.com/2011/02/covering-famous-ernest-hamlin-baker.html