Med Trained Roach
Trained Cockroach smuggles smokes, nice hack – Link.

Make 501
Inventors on the air, it’s like “American Inventor” but on the radio from the 1930’s (and I bet a lot better) – Link.

Xlg How Universe Was Formed
How the universe was formed (experiment!) – Link.

Med Watch Phonograph
Watch-case phonograph – Link.

More future, back then @ Modern Mechanix – Link.