Down The Gasoline Trail

As the Hemmings blog points out, despite nearly 80 years of development, this 1935 Jam Handy film about the internal combustion engine is still both relevant and informative.  The basic principles of the four stroke gasoline engine - "suck-squeeze-bang-blow," or (for you technical sorts) intake-compression-power-exhaust - remain the same now as they were in 1935.