by Clarence McWilliams
At Penn State University, Earth and Mineral Sciences, Steidle collection.
I like the artistic effect. The painting is dynamic, somewhat like the paintings of Thomas Hart Benton; see www.simayspace.com/thb.JPG and https://nbmaa.files.wordpress.com/2012/12/m1.png
The spokes on the pulleys and the location of the nearby Pitman arm might be portrayed incorrectly. For oil well terminology, see
http://upload.wikimedia.org/wikipedia/commons/3/3f/Pump_Jack_labelled.png
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