File:Popsci feb1941 fig1.jpg

From https://books.google.com/books?id=1SYDAAAAMBAJ&pg=PA59&lpg=PA59&dq=Kyle+Testerman+Los+Angeles+live+steam&source=bl&ots=18r-86DaZf&sig=jhk86XAN7oa6hjseh2yHLFvHg-U&hl=en&sa=X&ved=0ahUKEwid27G9oIzNAhUQ7mMKHQQWBo8Q6AEIIjAB#v=onepage&q=Kyle%20Testerman%20Los%20Angeles%20live%20steam&f=false