Midget Motor Mania!

I first saw this posting of Midget Motor Mania on the Hemmings blog, but there was not much information on the date.  After a little research, I found more detail on The Jalopy Journal.  Apparently, the newsreel was released in October 1940, and shows a "rail" type track in Reading, PA. 

From The Jalopy Journal post:

What’s interesting to consider, is that by the late 50s, the tether car hobby was nearly extinct. It’s been said that this happened due to a shrinking amount of spectators, as the pint-sized cars had just become too fast and the fans could no longer view them in action very easily. The little racers also lost some of their appeal when they began to get too streamlined in appearance, and no longer represented the real midget race cars of their day.